[UtilityClass] [issue #2384] Added a test to confirm no issue.

added some tests to confirm that lombok makes things static if needed.

test/transform/resource/after-delombok/UtilityClassInner.java

@@ -0,0 +1,8 @@
+class UtilityClassInner {
+	static final class UtilClass {
+		@java.lang.SuppressWarnings("all")
+		private UtilClass() {
+			throw new java.lang.UnsupportedOperationException("This is a utility class and cannot be instantiated");
+		}
+	}
+}