[Test] Drop DONT_TARGET_EXACT_BACKEND directive from some tests

This directive supposes that the given test should never be run
on the given backend, but here we actually just want to ignore it.
Most of the tests are fixed by previous commit and only one still
fails.

#KT-69941
#KT-69797

Author: ivandev0

compiler/testData/klib/syntheticAccessors/privateMember/crossFilePrivateLeak/leakingPrivateVarThroughReferenceInInternalInlineFun.kt

@@ -1,7 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// ^^^ Muted because accessor for function/constructor/property references are not generated for JS and first stage. To be fixed in KT-69797.
-// Can be replaced with ignore after KT-69941
-
 // FILE: A.kt
 class A {
     private var privateVar = 22

compiler/testData/klib/syntheticAccessors/privateMember/crossFilePrivateLeak/leakingPrivateVarThroughReferenceInPublicInlineFun.kt

@@ -1,7 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// ^^^ Muted because accessor for function/constructor/property references are not generated for JS and first stage. To be fixed in KT-69797.
-// Can be replaced with ignore after KT-69941
-
 // FILE: A.kt
 class A {
     private var privateVar = 22

compiler/testData/klib/syntheticAccessors/privateMember/crossModulePrivateLeak/leakingPrivateVarThroughReferenceInInternalInlineFun.kt

@@ -1,7 +1,6 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// ^^^ Muted because accessor for function/constructor/property references are not generated for JS and first stage. To be fixed in KT-69797.
-// Can be replaced with ignore after KT-69941
-
+// KT-76093: Support partial linkage for names of property references
+// IGNORE_BACKEND: JS_IR
+// IGNORE_KLIB_SYNTHETIC_ACCESSORS_CHECKS: JS_IR
 // KT-72862: Undefined symbols
 // IGNORE_NATIVE: cacheMode=STATIC_EVERYWHERE
 // KT-72862: No function found for symbol

compiler/testData/klib/syntheticAccessors/privateMember/singleFile/leakingPrivateMethodThroughReference.kt

@@ -1,7 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// ^^^ Muted because accessor for function/constructor/property references are not generated for JS and first stage. To be fixed in KT-69797.
-// Can be replaced with ignore after KT-69941
-
 class A {
     private fun privateMethod() = "OK"
 

compiler/testData/klib/syntheticAccessors/privateMember/singleFile/usePrivateVarFromReferenceInInternalInlineFun.kt

@@ -1,7 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// ^^^ Muted because accessor for function/constructor/property references are not generated for JS and first stage. To be fixed in KT-69797.
-// Can be replaced with ignore after KT-69941
-
 class A {
     private var privateVar = 22
 

compiler/testData/klib/syntheticAccessors/privateMember/singleFile/usePrivateVarFromReferenceInPublicInlineFun.kt

@@ -1,7 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// ^^^ Muted because accessor for function/constructor/property references are not generated for JS and first stage. To be fixed in KT-69797.
-// Can be replaced with ignore after KT-69941
-
 class A {
     private var privateVar = 22