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

^KT-61259

native/native.tests/testData/codegen/devirtualization/inline_getter.kt

@@ -1,3 +1,5 @@
+import kotlin.test.*
+
 interface Base { val id: Int }
 
 inline class Child(override val id: Int = 1) : Base
@@ -5,9 +7,11 @@ inline class Child(override val id: Int = 1) : Base
 interface Base2 { val prop: Base }
 class Child2(override val prop: Child) : Base2
 
-fun main() {
+fun box(): String {
     val x : Base = Child(5)
-    println(x.id)
+    assertEquals(5, x.id)
     val y : Base2 = Child2(Child(5))
-    println(y.prop)
+    assertEquals("Child(id=5)", y.prop.toString())
+
+    return "OK"
 }