Awaits fix a failing test

This test can not pass on 6.x It is expecting some deprecation messages
to be brought back on some REST tests yet it appears these particular
messages never appear in production code. This commit awaits fixes these
tests.

plugins/repository-gcs/src/test/java/org/elasticsearch/repositories/gcs/GoogleCloudStorageRepositoryDeprecationTests.java

@@ -31,6 +31,7 @@
 
 public class GoogleCloudStorageRepositoryDeprecationTests extends ESTestCase {
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/30638")
     public void testDeprecatedSettings() throws Exception {
         final Settings repositorySettings = Settings.builder()
             .put("bucket", "test")