Switch label: do not resolve unqualified enum constants referenced on the right side of arrow

Fixes IDEA-210771 Error message should be exposed for the new 'case' label in Java 12 in case of wrong constant usage

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting12/SwitchExpressionsEnumResolve.java

@@ -0,0 +1,12 @@
+import java.util.Random;
+
+class SwitchExpressionsEnumResolve {
+  enum E { E1, E2 }
+  
+  E test(E e) {
+    return switch (e) {
+      case E1 -> <error descr="Cannot resolve symbol 'E2'">E2</error>;
+      case E2 -> <error descr="Cannot resolve symbol 'E1'">E1</error>;
+    };
+  }
+}