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

^KT-61259

native/native.tests/testData/codegen/escapeAnalysis/test3.kt

@@ -2,8 +2,7 @@
  * Copyright 2010-2020 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 codegen.escapeAnalysis.test3
+// TODO: check mentioned debug output of escape analyser
 
 class A(val s: String)
 class B {
@@ -25,4 +24,4 @@ fun foo(a: A, b: B): String {
     return a.s
 }
 
-fun main() = println(foo(A("zzz"), B()))
+fun box(): String = foo(A("OK"), B())