[KLIB tool] Migrate 'dump-metadata' tests to K/N test infra

native/native.tests/testData/klib/dump-metadata/builtinsSerializer/sourceRetainedAnnotation.txt

@@ -1,7 +1,9 @@
+package test {
     @Retention(value = AnnotationRetention.SOURCE) @Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY, AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.TYPE, AnnotationTarget.TYPE_PARAMETER}) annotation class A constructor() : Annotation
     enum class Enum private constructor() : Enum<Enum> {
         enum entry ENTRY
     }
     class Klass constructor()
     fun <T> function(param: Unit)
-    val property: Unit
+    val property: Unit
+}