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

^KT-61259

native/native.tests/testData/codegen/function/defaultsFromFakeOverride.kt

@@ -3,12 +3,10 @@
  * that can be found in the LICENSE file.
  */
 
-package codegen.function.defaultsFromFakeOverride
-
 import kotlin.test.*
 
 interface I<T> {
-    fun f(x: String = "42"): String
+    fun f(x: String = "OK"): String
 }
 
 open class A<T> {
@@ -17,7 +15,7 @@ open class A<T> {
 
 class B : A<String>(), I<String>
 
-@Test fun runTest() {
+fun box(): String {
     val b = B()
-    println(b.f())
+    return b.f()
 }