Mute CoordinatorTests#testCannotJoinClusterWithDifferentUUID (#91838)

Relates #91837

server/src/test/java/org/elasticsearch/cluster/coordination/CoordinatorTests.java

@@ -1635,6 +1635,7 @@ public class CoordinatorTests extends AbstractCoordinatorTestCase {
         reason = "test includes assertions about JoinHelper logging",
         value = "org.elasticsearch.cluster.coordination.JoinHelper:INFO"
     )
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/91837")
     public void testCannotJoinClusterWithDifferentUUID() throws IllegalAccessException {
         try (Cluster cluster1 = new Cluster(randomIntBetween(1, 3))) {
             cluster1.runRandomly();