Revert "[K2] Temporary mute ACTUAL_ANNOTATION_CONFLICTING_DEFAULT_ARGUMENT_VALUE"

This reverts commit b232dbf484.

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/actualizer/checker/IrExpectActualAnnotationConflictingDefaultArgumentValueChecker.kt

@@ -36,15 +36,13 @@ internal object IrExpectActualAnnotationConflictingDefaultArgumentValueChecker :
                             ExpectActualCollectionArgumentsCompatibilityCheckStrategy.Default
                         )
                     ) {
-                        // TODO(Roman.Efremov): KT-62104 fix failing tests and unmute
-                        // reportError(expectClass, actualDefaultValue, actualParam)
+                        reportError(expectClass, actualDefaultValue, actualParam)
                     }
                 }
             }
         }
     }
 
-    @Suppress("unused")
     private fun IrExpectActualChecker.Context.reportError(
         expectAnnotationClass: IrClass,
         actualDefaultValue: IrExpression,