Change Signature: Fix descriptor comparison when receiver type is changed

#KT-9201 Fixed

idea/testData/refactoring/changeSignature/ImplicitThisToParameterWithChangedTypeAfter.kt

@@ -0,0 +1,5 @@
+open class Older { fun upper() {} }
+class Younger : Older()
+public fun outer(younger: Older) {
+    younger.upper()
+}

idea/testData/refactoring/changeSignature/ImplicitThisToParameterWithChangedTypeBefore.kt

@@ -0,0 +1,3 @@
+open class Older { fun upper() {} }
+class Younger : Older()
+public fun Younger.<caret>outer() { upper() }