Implement quick fix to convert a too long char literal to a string #KT-13635 Fixed

idea/testData/quickfix/tooLongCharLiteralToString/backslashShouldNotBeEscaped.kt

@@ -0,0 +1,5 @@
+// "Convert too long character literal to string" "true"
+
+fun foo() {
+    'foo\nbar'<caret>
+}

idea/testData/quickfix/tooLongCharLiteralToString/backslashShouldNotBeEscaped.kt.after

@@ -0,0 +1,5 @@
+// "Convert too long character literal to string" "true"
+
+fun foo() {
+    "foo\nbar"
+}

idea/testData/quickfix/tooLongCharLiteralToString/dollarShouldNotBeEscaped.kt

@@ -0,0 +1,6 @@
+// "Convert too long character literal to string" "true"
+// ERROR: Unresolved reference: bar
+
+fun foo() {
+    'foo$bar'<caret>
+}

idea/testData/quickfix/tooLongCharLiteralToString/dollarShouldNotBeEscaped.kt.after

@@ -0,0 +1,6 @@
+// "Convert too long character literal to string" "true"
+// ERROR: Unresolved reference: bar
+
+fun foo() {
+    "foo$bar"
+}

idea/testData/quickfix/tooLongCharLiteralToString/doubleQuotesShouldBeEscaped.kt

@@ -0,0 +1,5 @@
+// "Convert too long character literal to string" "true"
+
+fun foo() {
+    'foo"bar'<caret>
+}

idea/testData/quickfix/tooLongCharLiteralToString/doubleQuotesShouldBeEscaped.kt.after

@@ -0,0 +1,5 @@
+// "Convert too long character literal to string" "true"
+
+fun foo() {
+    "foo\"bar"
+}