Minor, move builtins serializer test data

compiler/testData/serialization/builtinsSerializer/annotationArguments/annotation.kt

@@ -0,0 +1,14 @@
+package test
+
+annotation class Empty
+
+annotation class JustAnnotation(val annotation: Empty)
+
+annotation class AnnotationArray(val annotationArray: Array<JustAnnotation>)
+
+JustAnnotation(Empty())
+AnnotationArray(array())
+class C1
+
+AnnotationArray(array(JustAnnotation(Empty()), JustAnnotation(Empty())))
+class C2