Mute RollupIndexerStateTests.testStateChangeMidTrigger (#90859)

relates #90661

x-pack/plugin/rollup/src/test/java/org/elasticsearch/xpack/rollup/job/RollupIndexerStateTests.java

@@ -338,6 +338,7 @@ public class RollupIndexerStateTests extends ESTestCase {
         }
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/90661")
     public void testStateChangeMidTrigger() {
         AtomicReference<IndexerState> state = new AtomicReference<>(IndexerState.STOPPED);