Update Bazel references to rules_pkg to the supported file locations. (protocolbuffers#15780)

WIP:  I want to see this pass CI first.

Fixes: protocolbuffers#15779

3 scripted transforms:
```
  -load("@rules_pkg//:mappings.bzl", ...)
  +load("@rules_pkg//pkg:mappings.bzl", ...)
```
```
  -load("@rules_pkg//:pkg.bzl", "pkg_tar")
  +load("@rules_pkg//pkg:tar.bzl", "pkg_tar")
```
```
  -load("@rules_pkg//:pkg.bzl", "pkg_zip")
  +load("@rules_pkg//pkg:zip.bzl", "pkg_zip")
```

Closes protocolbuffers#15780

COPYBARA_INTEGRATE_REVIEW=protocolbuffers#15780 from aiuto:rules_pkg a630276
PiperOrigin-RevId: 606641398

Author: aiuto

BUILD.bazel

@@ -2,7 +2,7 @@
 
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_proto_library")
 load("@rules_java//java:defs.bzl", "java_lite_proto_library", "java_proto_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_lang_toolchain", "proto_library")
 load("//build_defs:cpp_opts.bzl", "COPTS", "LINK_OPTS")
 load(":protobuf.bzl", "internal_objc_proto_library", "internal_php_proto_library", "internal_py_proto_library")

build_defs/BUILD.bazel

@@ -2,7 +2,7 @@
 
 load("@bazel_skylib//lib:selects.bzl", "selects")
 load("@rules_cc//cc:defs.bzl", starlark_cc_proto_library = "cc_proto_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load(":cc_proto_blacklist_test.bzl", "cc_proto_blacklist_test")
 load(":compiler_config_setting.bzl", "create_compiler_config_setting")
 

conformance/BUILD.bazel

@@ -2,7 +2,7 @@
 
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_proto_library", "objc_library")
 load(
-    "@rules_pkg//:mappings.bzl",
+    "@rules_pkg//pkg:mappings.bzl",
     "pkg_filegroup",
     "pkg_files",
     "strip_prefix",

csharp/BUILD.bazel

@@ -2,7 +2,7 @@
 #
 # See also code generation logic under /src/google/protobuf/compiler/csharp.
 
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:internal_shell.bzl", "inline_sh_test")
 load("//conformance:defs.bzl", "conformance_test")
 

csharp/src/Google.Protobuf.Conformance/BUILD.bazel

@@ -1,5 +1,5 @@
 load("//build_defs:internal_shell.bzl", "inline_sh_binary")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 
 inline_sh_binary(
     name = "build_conformance_test",

examples/BUILD.bazel

@@ -6,7 +6,7 @@
 
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_proto_library")
 load("@rules_java//java:defs.bzl", "java_binary", "java_lite_proto_library", "java_proto_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_library")
 
 # For each .proto file, a proto_library target should be defined. This target

java/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@rules_pkg//:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
 
 # Run Linkage Monitor
 sh_test(

java/core/BUILD.bazel

@@ -1,6 +1,6 @@
 load("@bazel_skylib//rules:build_test.bzl", "build_test")
 load("@rules_java//java:defs.bzl", "java_lite_proto_library", "java_proto_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_lang_toolchain", "proto_library")
 load("//:protobuf.bzl", "internal_gen_well_known_protos_java")
 load("//:protobuf_version.bzl", "PROTOBUF_JAVA_VERSION")

java/internal/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 
 package(default_visibility = ["//java:__subpackages__"])
 

java/kotlin-lite/BUILD.bazel

@@ -1,7 +1,7 @@
 load("@io_bazel_rules_kotlin//kotlin:jvm.bzl", "kt_jvm_library")
 load("@rules_java//java:defs.bzl", "java_lite_proto_library")
 load("@rules_jvm_external//:kt_defs.bzl", "kt_jvm_export")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//:protobuf.bzl", "internal_gen_kt_protos")
 load("//:protobuf_version.bzl", "PROTOBUF_JAVA_VERSION")
 

java/kotlin/BUILD.bazel

@@ -1,7 +1,7 @@
 load("@io_bazel_rules_kotlin//kotlin:jvm.bzl", "kt_jvm_library")
 load("@rules_java//java:defs.bzl", "java_proto_library")
 load("@rules_jvm_external//:kt_defs.bzl", "kt_jvm_export")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_library")
 load("//:protobuf_version.bzl", "PROTOBUF_JAVA_VERSION")
 load("//:protobuf.bzl", "internal_gen_kt_protos")

java/lite/BUILD.bazel

@@ -1,5 +1,5 @@
 load("@bazel_skylib//rules:build_test.bzl", "build_test")
-load("@rules_pkg//:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_lang_toolchain")
 load("//conformance:defs.bzl", "conformance_test")
 load("//java/internal:testing.bzl", "junit_tests")

java/util/BUILD.bazel

@@ -1,5 +1,5 @@
 load("@rules_java//java:defs.bzl", "java_proto_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_library")
 load("//build_defs:java_opts.bzl", "protobuf_java_export", "protobuf_versioned_java_library")
 load("//:protobuf_version.bzl", "PROTOBUF_JAVA_VERSION")

objectivec/BUILD.bazel

@@ -1,5 +1,5 @@
 load("@rules_cc//cc:defs.bzl", "objc_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//upb/cmake:build_defs.bzl", "staleness_test")
 load("//conformance:defs.bzl", "conformance_test")
 load(":defs.bzl", "objc_proto_camel_case_name")

php/BUILD.bazel

@@ -2,8 +2,8 @@
 #
 # See also code generation logic under /src/google/protobuf/compiler/php.
 
-load("@rules_pkg//:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
-load("@rules_pkg//:pkg.bzl", "pkg_tar")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:tar.bzl", "pkg_tar")
 load("//:protobuf_version.bzl", "PROTOBUF_PHP_VERSION", "PROTOC_VERSION")
 load("//build_defs:internal_shell.bzl", "inline_sh_binary")
 load("//conformance:defs.bzl", "conformance_test")

pkg/BUILD.bazel

@@ -1,9 +1,9 @@
 load(
-    "@rules_pkg//:mappings.bzl",
+    "@rules_pkg//pkg:mappings.bzl",
     "pkg_attributes",
     "pkg_files",
 )
-load("@rules_pkg//:pkg.bzl", "pkg_zip")
+load("@rules_pkg//pkg:zip.bzl", "pkg_zip")
 load("//:protobuf_release.bzl", "package_naming")
 load(":build_systems.bzl", "gen_file_lists")
 load(":cc_dist_library.bzl", "cc_dist_library")

pkg/build_systems.bzl

@@ -1,7 +1,7 @@
 """Starlark utilities for working with other build systems."""
 
 load("@bazel_skylib//lib:paths.bzl", "paths")
-load("@rules_pkg//:providers.bzl", "PackageFilegroupInfo", "PackageFilesInfo")
+load("@rules_pkg//pkg:providers.bzl", "PackageFilegroupInfo", "PackageFilesInfo")
 load(":cc_dist_library.bzl", "CcFileList")
 
 ################################################################################

protobuf_release.bzl

@@ -2,7 +2,7 @@
 Generates package naming variables for use with rules_pkg.
 """
 
-load("@rules_pkg//:providers.bzl", "PackageVariablesInfo")
+load("@rules_pkg//pkg:providers.bzl", "PackageVariablesInfo")
 load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain")
 load(":protobuf_version.bzl", "PROTOC_VERSION")
 

python/BUILD.bazel

@@ -11,7 +11,7 @@ load("@bazel_skylib//rules:common_settings.bzl", "bool_flag", "string_flag")
 load("//bazel:build_defs.bzl", "UPB_DEFAULT_COPTS")
 
 # begin:github_only
-load("@rules_pkg//:mappings.bzl", "pkg_files")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files")
 load("//python:build_targets.bzl", "build_targets")
 
 build_targets(name = "python")

python/build_targets.bzl

@@ -6,7 +6,7 @@
 #   //:protobuf_python
 #   //:well_known_types_py_pb2
 
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_python//python:defs.bzl", "py_library")
 load("//:protobuf.bzl", "internal_py_proto_library")
 load("//build_defs:arch_tests.bzl", "aarch64_test", "x86_64_test")

python/dist/BUILD.bazel

@@ -6,8 +6,8 @@
 # https://developers.google.com/open-source/licenses/bsd
 
 load("@pip_deps//:requirements.bzl", "requirement")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
-load("@rules_pkg//:pkg.bzl", "pkg_tar")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:tar.bzl", "pkg_tar")
 load("@rules_python//python:packaging.bzl", "py_wheel")
 load("@system_python//:version.bzl", "SYSTEM_PYTHON_VERSION")
 load("//:protobuf_version.bzl", "PROTOBUF_PYTHON_VERSION")

ruby/BUILD.bazel

@@ -4,7 +4,7 @@
 
 load("@bazel_skylib//lib:selects.bzl", "selects")
 load("@bazel_skylib//rules:common_settings.bzl", "string_flag")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_ruby//ruby:defs.bzl", "ruby_library")
 load("//python:internal.bzl", "internal_copy_files")
 load("//ruby:defs.bzl", "internal_ruby_proto_library")

ruby/ext/google/protobuf_c/BUILD.bazel

@@ -1,5 +1,5 @@
 load("@build_bazel_rules_apple//apple:apple_binary.bzl", "apple_binary")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//upb/cmake:build_defs.bzl", "staleness_test")
 
 package(default_visibility = ["//ruby:__subpackages__"])

ruby/lib/google/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_ruby//ruby:defs.bzl", "ruby_library")
 
 config_setting(

ruby/src/main/java/BUILD.bazel

@@ -1,5 +1,5 @@
 load("@rules_java//java:defs.bzl", "java_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 
 java_library(
     name = "protobuf_java",

ruby/tests/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_ruby//ruby:defs.bzl", "ruby_library", "ruby_test")
 load("//ruby:defs.bzl", "internal_ruby_proto_library")
 

src/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 # Most rules are under google/protobuf. This package exists for convenience.
-load("@rules_pkg//:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
 load("//conformance:defs.bzl", "conformance_test")
 load("//upb/cmake:build_defs.bzl", "staleness_test")
 

src/google/protobuf/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_proto_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_library")
 load("//build_defs:cpp_opts.bzl", "COPTS", "LINK_OPTS")
 load("//upb/cmake:build_defs.bzl", "staleness_test")

src/google/protobuf/compiler/BUILD.bazel

@@ -4,7 +4,7 @@
 
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_proto_library", "cc_test")
 load(
-    "@rules_pkg//:mappings.bzl",
+    "@rules_pkg//pkg:mappings.bzl",
     "pkg_attributes",
     "pkg_files",
     "strip_prefix",

src/google/protobuf/compiler/cpp/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_proto_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_library")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 

src/google/protobuf/compiler/csharp/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 cc_library(

src/google/protobuf/compiler/java/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 cc_library(

src/google/protobuf/compiler/objectivec/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 cc_library(

src/google/protobuf/compiler/php/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 cc_library(

src/google/protobuf/compiler/python/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 cc_library(

src/google/protobuf/compiler/ruby/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 cc_library(

src/google/protobuf/io/BUILD.bazel

@@ -1,7 +1,7 @@
 # Protobuf IO library.
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
 package(

src/google/protobuf/stubs/BUILD.bazel

@@ -2,7 +2,7 @@
 #   These are utilities that mirror the behavior of internal Google code.
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS", "LINK_OPTS")
 
 package(

src/google/protobuf/testing/BUILD.bazel

@@ -2,7 +2,7 @@
 #   This package contains testonly utilities used in C++ unit tests.
 
 load("@rules_cc//cc:defs.bzl", "cc_library")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS", "LINK_OPTS")
 
 package(

src/google/protobuf/util/BUILD.bazel

@@ -3,7 +3,7 @@
 ################################################################################
 
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_proto_library", "cc_test")
-load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("@rules_proto//proto:defs.bzl", "proto_library")
 load("//build_defs:cpp_opts.bzl", "COPTS")