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

^KT-61259

native/native.tests/testData/codegen/enum/isFrozen.kt

@@ -3,7 +3,6 @@
  * that can be found in the LICENSE file.
  */
 @file:OptIn(FreezingIsDeprecated::class, kotlin.experimental.ExperimentalNativeApi::class)
-package codegen.enum.isFrozen
 
 import kotlin.test.*
 import kotlin.native.concurrent.*
@@ -13,7 +12,7 @@ enum class Zzz(val zzz: String, var value: Int = 0) {
     Z2("z2")
 }
 
-@Test fun runTest() {
+fun box(): String {
     if (Platform.memoryModel == MemoryModel.STRICT) {
         assertTrue(Zzz.Z1.isFrozen)
         assertFailsWith<InvalidMutabilityException> {
@@ -25,4 +24,6 @@ enum class Zzz(val zzz: String, var value: Int = 0) {
         Zzz.Z1.value = 42
         assertEquals(42, Zzz.Z1.value)
     }
+
+    return "OK"
 }