fix max topic for namespace does not work (apache#9193)

This PR fix max topic for namespace does not work.

Max topic configuration for namespace does not work well. This is caused by currently we use globalZK to get the children node of "/managed-ledgers/tenant/namespace/domain" when caculate the number of existed topics.

Znode of "/managed-ledgers/tenant/namespace/domain" should be accessed by localZK instead.

pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/AdminResource.java

@@ -812,7 +812,7 @@ protected List<String> getTopicPartitionList(TopicDomain topicDomain) {
         try {
             String topicPartitionPath = joinPath(MANAGED_LEDGER_PATH_ZNODE,
                     namespaceName.toString(), topicDomain.value());
-            List<String> topics = globalZk().getChildren(topicPartitionPath, false);
+            List<String> topics = localZk().getChildren(topicPartitionPath, false);
             topicPartitions = topics.stream()
                     .map(s -> String.format("%s://%s/%s", topicDomain.value(), namespaceName.toString(), decode(s)))
                     .collect(Collectors.toList());