Rename: Drop 'operator' keyword if new name doesn't correspond to any convention

#KT-9357 Fixed

idea/testData/refactoring/rename/renameCompareTo/before/compareTo.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun compareTo(other: A): Int = n.compareTo(other.n)
+    operator fun compareTo(other: A): Int = n.compareTo(other.n)
 }
 
 fun test() {

idea/testData/refactoring/rename/renameContains/before/contains.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun contains(k: Int): Boolean = k <= n
+    operator fun contains(k: Int): Boolean = k <= n
 }
 
 fun test() {

idea/testData/refactoring/rename/renameContainsWithConflicts/before/containsWithConflicts.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun contains(k: Int): Boolean = k <= n
+    operator fun contains(k: Int): Boolean = k <= n
 }
 
 fun test() {

idea/testData/refactoring/rename/renameEquals/before/equals.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    override fun equals(other: Any?): Boolean = other is A && other.n == n
+    override operator fun equals(other: Any?): Boolean = other is A && other.n == n
 }
 
 fun test() {

idea/testData/refactoring/rename/renameExplicitComponentFunction/before/explicitComponentFunction.kt

@@ -1,7 +1,7 @@
 class A(val n: Int, val s: String, val o: Any) {
-    fun component1(): Int = n
-    fun component2(): String = s
-    fun component3(): Any = o
+    operator fun component1(): Int = n
+    operator fun component2(): String = s
+    operator fun component3(): Any = o
 }
 
 fun test() {

idea/testData/refactoring/rename/renameGet/before/get.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun get(i: Int): A = A(i)
+    operator fun get(i: Int): A = A(i)
 }
 
 fun test() {

idea/testData/refactoring/rename/renameInc/before/inc.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun inc(): A = A(n + 1)
+    operator fun inc(): A = A(n + 1)
 }
 
 fun test() {

idea/testData/refactoring/rename/renameInvoke/before/invoke.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun invoke(i: Int): A = A(i)
+    operator fun invoke(i: Int): A = A(i)
 }
 
 fun test() {

idea/testData/refactoring/rename/renameIterator/before/iterator.kt

@@ -1,5 +1,5 @@
 class A {
-    public fun iterator(): Iterator<String> = throw IllegalStateException("")
+    public operator fun iterator(): Iterator<String> = throw IllegalStateException("")
 }
 
 fun test() {

idea/testData/refactoring/rename/renamePlus/before/plus.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun plus(m: Int): A = A(n + m)
+    operator fun plus(m: Int): A = A(n + m)
 }
 
 fun test() {

idea/testData/refactoring/rename/renamePlusAssign/before/plusAssign.kt

@@ -1,5 +1,5 @@
 class A(var n: Int) {
-    fun plusAssign(m: Int) {
+    operator fun plusAssign(m: Int) {
         n += m
     }
 }

idea/testData/refactoring/rename/renameSet/before/set.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun set(i: Int, a: A) {}
+    operator fun set(i: Int, a: A) {}
 }
 
 fun test() {

idea/testData/refactoring/rename/renameUnaryMinus/before/unaryMinus.kt

@@ -1,5 +1,5 @@
 class A(val n: Int) {
-    fun minus(): A = this
+    operator fun minus(): A = this
 }
 
 fun test() {