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

native/native.tests/testData/klib/dump-metadata/TopLevelPropertiesWithClassesCustomPackage.txt

@@ -0,0 +1,9 @@
+package custom.pkg {
+    object Bar
+    class Foo constructor()
+    typealias MyTransformer = (String) -> Int
+    val v1: Int = 1
+    val v2: String = "hello"
+    val v3: (String) -> Int
+    val v4: MyTransformer /* = (String) -> Int */
+}