Mute DeleteExpiredDataIT.testDeleteExpiredData

Due to https://github.com/elastic/elasticsearch/issues/39575

x-pack/plugin/ml/qa/native-multi-node-tests/src/test/java/org/elasticsearch/xpack/ml/integration/DeleteExpiredDataIT.java

@@ -91,6 +91,7 @@ public class DeleteExpiredDataIT extends MlNativeAutodetectIntegTestCase {
         client().execute(DeleteExpiredDataAction.INSTANCE, new DeleteExpiredDataAction.Request()).get();
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/39575")
     public void testDeleteExpiredData() throws Exception {
         // Index some unused state documents (more than 10K to test scrolling works)
         BulkRequestBuilder bulkRequestBuilder = client().prepareBulk();