Ignore warning for index creation prefixed by a dot during cluster settings wipe

Author: benchaplin

muted-tests.yml

@@ -420,9 +420,6 @@ tests:
 - class: org.elasticsearch.indices.stats.IndexStatsIT
   method: testThrottleStats
   issue: https://github.com/elastic/elasticsearch/issues/126359
-- class: org.elasticsearch.xpack.remotecluster.RemoteClusterSecurityRestIT
-  method: testTaskCancellation
-  issue: https://github.com/elastic/elasticsearch/issues/128009
 - class: org.elasticsearch.xpack.esql.action.CrossClusterQueryWithPartialResultsIT
   method: testOneRemoteClusterPartial
   issue: https://github.com/elastic/elasticsearch/issues/124055

test/framework/src/main/java/org/elasticsearch/test/rest/ESRestTestCase.java

@@ -1369,13 +1369,16 @@ private static void wipeClusterSettings() throws IOException {
 
         if (mustClear.get()) {
             request.setOptions(RequestOptions.DEFAULT.toBuilder().setWarningsHandler(warnings -> {
-                if (warnings.isEmpty()) {
-                    return false;
-                } else if (warnings.size() > 1) {
-                    return true;
-                } else {
-                    return warnings.get(0).contains("xpack.monitoring") == false;
+                for (String warning : warnings) {
+                    if (warning.contains("xpack.monitoring")) {
+                        SUITE_LOGGER.warn("Ignoring xpack monitoring warning during test cleanup: {}", warning);
+                    } else if (warning.contains("name begins with a dot")) {
+                        SUITE_LOGGER.warn("Ignoring dot prefix warning during test cleanup: {}", warning);
+                    } else {
+                        return true;
+                    }
                 }
+                return false;
             }));
             cleanupClient().performRequest(request);
         }