Extract function: Do not report conflicts for fake overrides/delegates of the same callable declaration

idea/testData/refactoring/extractFunction/basic/fakeOverride.kt.after

@@ -0,0 +1,11 @@
+trait T {
+    fun test() {}
+}
+
+fun foo() {
+    __dummyTestFun__()
+}
+
+private fun __dummyTestFun__() {
+    (object : T {}).test()
+}