Inline Variable: Inline string template entries

#KT-7654 Fixed

idea/testData/refactoring/inline/stringTemplates/rawString.kt

@@ -0,0 +1,7 @@
+fun foo() {
+    val a = 1
+    val <caret>x = """_
+    $a:${a + 1}
+    _"""
+    val y = """!!x=$x!!"""
+}