Add name to argument: do not remove necessary backticks

#KT-30894 Fixed

idea/testData/intentions/addNameToArgument/backtickedArgument.kt

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `fun`: Int) {
+}
+
+fun main() {
+    foo(1, 2<caret>)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument.kt.after

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `fun`: Int) {
+}
+
+fun main() {
+    foo(1, `fun` = 2)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument2.kt

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `2`: Int) {
+}
+
+fun main() {
+    foo(1, 2<caret>)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument2.kt.after

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `2`: Int) {
+}
+
+fun main() {
+    foo(1, `2` = 2)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument3.kt

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `2a`: Int) {
+}
+
+fun main() {
+    foo(1, 2<caret>)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument3.kt.after

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `2a`: Int) {
+}
+
+fun main() {
+    foo(1, `2a` = 2)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument4.kt

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `a`: Int) {
+}
+
+fun main() {
+    foo(1, 2<caret>)
+}

idea/testData/intentions/addNameToArgument/backtickedArgument4.kt.after

@@ -0,0 +1,6 @@
+fun foo(`1`: Int, `a`: Int) {
+}
+
+fun main() {
+    foo(1, a = 2)
+}