Extract Function: Add backticks to non-identifiers and references originally surrounded in backticks

#KT-8192 Fixed

idea/testData/refactoring/extractFunction/parameters/misc/replaceWithBackticks2.kt.after

@@ -0,0 +1,10 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_DESCRIPTOR: val i: kotlin.Int defined in test
+fun test() {
+    val i = 0
+    __dummyTestFun__(i)
+}
+
+private fun __dummyTestFun__(i: Int) {
+    i plus `i`
+}