Generate bytecode for delegated properties

compiler/testData/codegen/box/delegatedProperty/getAsExtensionFunInClass.kt

@@ -0,0 +1,11 @@
+class Delegate {
+}
+
+class A {
+    fun Delegate.get(t: Any?, p: String): Int = 1
+    val prop: Int by Delegate()
+}
+
+fun box(): String {
+  return if(A().prop == 1) "OK" else "fail"
+}