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

^KT-61259

native/native.tests/testData/codegen/interfaceCallsNCasts/interface0.kt

@@ -2,9 +2,6 @@
  * Copyright 2010-2018 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.interface0
-
 import kotlin.test.*
 
 interface A {
@@ -12,14 +9,17 @@ interface A {
     fun c()
 }
 
+val sb = StringBuilder()
+
 class B(): A {
     override fun c() {
-        println("PASSED")
+        sb.append("OK")
     }
 }
 
-@Test fun runTest() {
+fun box(): String {
     val a:A = B()
     a.b()
-}
 
+    return sb.toString()
+}