[K/N][Tests] Adjust moved tests interfaceCallsNCasts..vector to new infra

^KT-61259

native/native.tests/testData/codegen/objectExpression/expr2.kt

@@ -3,11 +3,10 @@
  * that can be found in the LICENSE file.
  */
 
-package codegen.objectExpression.expr2
 import kotlin.test.*
 
-@Test fun runTest() {
-    val a = "a"
+fun box(): String {
+    val a = "OK"
 
     val x = object {
         override fun toString(): String {
@@ -19,7 +18,5 @@ import kotlin.test.*
         fun foo(lambda: () -> String) = lambda()
     }
 
-    print(x)
+    return x.toString()
 }
-
-fun print(x: Any) = println(x.toString())