[K/N][Tests] Migrate objcSmoke & objcTests tests

^KT-61259

native/native.tests/testData/interop/objc/tests/tryRetainGC.kt

@@ -0,0 +1,27 @@
+@file:OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+
+import kotlinx.cinterop.*
+import kotlin.test.*
+import objcTests.*
+
+@Test
+fun testTryRetainGC() {
+    kotlin.native.runtime.GC.collect()
+    val weakRefHolder = WeakRefHolder()
+    createGarbageNSObjects(weakRefHolder)
+    weakRefHolder.obj = object : NSObject() {}
+    // Loading weak ref takes a lock. If K/N runtime runs GC while the lock is taken,
+    // then it releases garbage objects and thus Obj-C runtime might take a recursive lock
+    // and abort in _os_unfair_lock_recursive_abort.
+    weakRefHolder.loadManyTimes()
+}
+
+private fun createGarbageNSObjects(weakRefHolder: WeakRefHolder) {
+    autoreleasepool {
+        repeat(100) {
+            // Assigning the object to a weak reference so Obj-C would take a lock when deallocating it:
+            weakRefHolder.obj = NSObject()
+        }
+        weakRefHolder.obj = null
+    }
+}