Mute ClusterDisruptionIT#testSendingShardFailure

Tracked by #33704

server/src/test/java/org/elasticsearch/discovery/ClusterDisruptionIT.java

@@ -288,6 +288,7 @@ public class ClusterDisruptionIT extends AbstractDisruptionTestCase {
     }
 
     // simulate handling of sending shard failure during an isolation
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/33704")
     public void testSendingShardFailure() throws Exception {
         List<String> nodes = startCluster(3, 2);
         String masterNode = internalCluster().getMasterName();