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

idea/testData/refactoring/extractFunction/basic/delegatingFunction.kt

@@ -0,0 +1,10 @@
+// PARAM_DESCRIPTOR: val t: <no name provided> defined in foo
+// PARAM_TYPES: T
+trait T {
+    fun test() {}
+}
+
+fun foo() {
+    val t = object: T {}
+    <selection>(object: T by t {}).test()</selection>
+}

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

@@ -0,0 +1,14 @@
+// PARAM_DESCRIPTOR: val t: <no name provided> defined in foo
+// PARAM_TYPES: T
+trait T {
+    fun test() {}
+}
+
+fun foo() {
+    val t = object: T {}
+    __dummyTestFun__(t)
+}
+
+private fun __dummyTestFun__(t: T) {
+    (object : T by t {}).test()
+}

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

@@ -0,0 +1,7 @@
+trait T {
+    fun test() {}
+}
+
+fun foo() {
+    <selection>(object: T {}).test()</selection>
+}

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()
+}