[K2/N] Add klib contents serialization tests from old testinfra

Merge-request: KT-MR-8509
Merged-by: Vladimir Sukharev <Vladimir.Sukharev@jetbrains.com>

native/native.tests/testData/klibContents/builtinsSerializer/nestedClassesAndObjects.txt

@@ -0,0 +1,23 @@
+    class ClassA constructor() {
+        companion object {
+            val stat: Int = 250
+            class D constructor() {
+                val memberFromD: Int = 275
+            }
+        }
+        object ObjA {
+            val memberFromObjA: Int = 300
+        }
+        class classB constructor() {
+            fun memberFromB(): Int
+            class BC constructor() {
+                val memberFromBB: Int = 150
+            }
+            object BO {
+                val memberFromBO: Int = 175
+            }
+        }
+        inner class classC constructor() {
+            val memberFromC: Int = 200
+        }
+    }