preserve text blocks when converting to (message)format string (IDEA-217253, IDEA-218831)

and use new text block escaping

GitOrigin-RevId: cc8eea8aa0c638b967e40b6a6b4b9dea1cfed61d

java/java-tests/testData/codeInsight/concatenationToMessageFormat/escaping.java

@@ -0,0 +1,5 @@
+class C {
+  private static String quote(String s) {
+    return '"' + <caret>s + '"';
+  }
+}