Remove some legacy codegen tests, move some to generated

compiler/testData/codegen/box/delegation/delegationToVal.kt

@@ -0,0 +1,46 @@
+// WITH_RUNTIME
+// FULL_JDK
+
+interface IActing {
+    fun act(): String
+}
+
+class CActing(val value: String = "OK") : IActing {
+    override fun act(): String = value
+}
+
+// final so no need in delegate field
+class Test(val acting: CActing = CActing()) : IActing by acting {
+}
+
+// even if open so we don't need delegate field
+open class Test2(open val acting: CActing = CActing()) : IActing by acting {
+}
+
+// even if open the backing field is final, so we don't need delegate field
+class Test3() : Test2() {
+    override val acting = CActing("OKOK")
+}
+
+fun box(): String {
+    try {
+        Test::class.java.getDeclaredField("\$delegate_0")
+        return "\$delegate_0 field generated for class Test but should not"
+    }
+    catch (e: NoSuchFieldException) {
+        // ok
+    }
+
+    try {
+        Test2::class.java.getDeclaredField("\$delegate_0")
+        return "\$delegate_0 field generated for class Test but should not"
+    }
+    catch (e: NoSuchFieldException) {
+        // ok
+    }
+
+    if (Test3().acting.act() != "OKOK") return "Fail Test3"
+
+    val test = Test()
+    return test.act()
+}