Change Function Signature Fix: Do not render default values in overriding functions

#KT-8520 Fixed

idea/testData/quickfix/override/nothingToOverride/noDefaultValuesInOverride.kt

@@ -0,0 +1,8 @@
+// "Change function signature to 'fun foo(a: Int, b: String): Any?'" "true"
+interface  A {
+    public fun foo(a: Int = 1, b: String = "str"): Any?
+}
+
+class B : A {
+    public override<caret> fun foo(a: Int): Any? = null
+}

idea/testData/quickfix/override/nothingToOverride/noDefaultValuesInOverride.kt.after

@@ -0,0 +1,8 @@
+// "Change function signature to 'fun foo(a: Int, b: String): Any?'" "true"
+interface  A {
+    public fun foo(a: Int = 1, b: String = "str"): Any?
+}
+
+class B : A {
+    public override<caret> fun foo(a: Int, b: String): Any? = null
+}