[K/N][tests] Adjust moved tests to new testing infra

^KT-61259

native/native.tests/testData/codegen/initializers/initializers8.kt

@@ -2,13 +2,10 @@
  * Copyright 2010-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
-
-package runtime.basic.initializers8
-
 import kotlin.test.*
 
-var globalString = "abc"
+var globalString = "OK"
 
-@Test fun runTest() {
-    assertEquals("abc", globalString)
+fun box(): String {
+    return globalString
 }