[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/classDelegation/property.kt

@@ -0,0 +1,26 @@
+/*
+ * 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.
+ */
+// JVM_ABI_K1_K2_DIFF: KT-63828
+// WITH_STDLIB
+
+import kotlin.test.*
+
+interface A {
+    val x: Int
+}
+
+class C: A {
+    override val x: Int = 42
+}
+
+class Q(a: A): A by a
+
+fun box(): String {
+    val q = Q(C())
+    val a: A = q
+    if (q.x != 42) return "FAIL q.x=${q.x}"
+    if (a.x != 42) return "FAIL a.x=${a.x}"
+    return "OK"
+}