Support any constant expressions as annotation arguments

compiler/testData/loadJava/compiledJava/annotations/AnnotationWithStringConcatenationInParam.java

@@ -0,0 +1,10 @@
+package test;
+
+public interface AnnotationWithStringConcatenationInParam {
+    public @interface Anno {
+        String value();
+    }
+
+    @Anno("he" + "l" + "lo")
+    public static class Class { }
+}