[K/N][Tests] Adjust moved codegen tests to new infra

^KT-61259

native/native.tests/testData/codegen/initializers/eagerInitializationThreadLocal2.kt

@@ -2,6 +2,8 @@
  * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
+// KT-64408: when undisabled (by removing next line), the compiled .kexe wrongly contains no tests
+// DISABLE_NATIVE: cacheMode=STATIC_PER_FILE_EVERYWHERE
 
 // FILE: lib.kt
 @ThreadLocal
@@ -27,8 +29,10 @@ val y2 = run { z3 = true; 117 }
 // FILE: main.kt
 import kotlin.test.*
 
-fun main() {
+fun box(): String {
     assertTrue(z1)
     assertFalse(z2)
     assertFalse(z3)
+
+    return "OK"
 }