opentelemetry-go-contrib: initial integration (#13006)

Towards
open-telemetry/opentelemetry-go-contrib#6605

OpenTelemetry is a collection of APIs, SDKs, and tools to instrument,
generate, collect, and export telemetry data (metrics, logs, and
traces). It is a CNCF-hosted project that is adopted by companies like
eBay, GitHub, Shopify, Skyscanner [and many
others](https://opentelemetry.io/ecosystem/adopters/).

This is adding fuzz tests for
https://github.com/open-telemetry/opentelemetry-go-contrib repository.
Here are the current fuzz tests:
https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/config/v0.3.0/fuzz_test.go
 
I think it would be good to add
https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/config/testdata
as corpus, but I would rather do it in a separate PR.

projects/opentelemetry-go-contrib/Dockerfile

@@ -0,0 +1,20 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder-go
+RUN go install github.com/AdamKorcz/go-118-fuzz-build@latest
+RUN git clone --depth 1 https://github.com/open-telemetry/opentelemetry-go-contrib
+COPY build.sh $SRC/

projects/opentelemetry-go-contrib/build.sh

@@ -0,0 +1,24 @@
+#!/bin/bash -eu
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+cd $SRC/opentelemetry-go-contrib
+
+pushd config/v0.3.0
+go get github.com/AdamKorcz/go-118-fuzz-build/testing
+compile_native_go_fuzzer $(go list) FuzzJSON FuzzJSON
+compile_native_go_fuzzer $(go list) FuzzYAML FuzzYAML
+popd

projects/opentelemetry-go-contrib/project.yaml

@@ -0,0 +1,10 @@
+homepage: "https://opentelemetry.io/"
+language: go
+primary_contact: "[email protected]"
+main_repo: "https://github.com/open-telemetry/opentelemetry-go-contrib/"
+auto_ccs:
+  - "[email protected]"
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address