Mute FullClusterRestartTest#testWatcher and bring back 30s timeout for yellow

The timeout was increased to 60s to allow this test more time to reach a
yellow state. However, the test will still on occasion fail even with the
60s timeout.

Related: elastic#48381
Related: elastic#48434
Related: elastic#47950
Related: elastic#40178

Author: jakelandis

x-pack/qa/full-cluster-restart/src/test/java/org/elasticsearch/xpack/restart/FullClusterRestartIT.java

@@ -123,6 +123,7 @@ public void testSecurityNativeRealm() throws Exception {
     }
 
     @SuppressWarnings("unchecked")
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/48381")
     public void testWatcher() throws Exception {
         if (isRunningAgainstOldCluster()) {
             logger.info("Adding a watch on old cluster {}", getOldClusterVersion());
@@ -415,7 +416,7 @@ private void assertBasicWatchInteractions() throws Exception {
     private void waitForYellow(String indexName) throws IOException {
         Request request = new Request("GET", "/_cluster/health/" + indexName);
         request.addParameter("wait_for_status", "yellow");
-        request.addParameter("timeout", "60s");
+        request.addParameter("timeout", "30s");
         request.addParameter("wait_for_no_relocating_shards", "true");
         request.addParameter("wait_for_no_initializing_shards", "true");
         Map<String, Object> response = entityAsMap(client().performRequest(request));