[Feature] Create a topic using clusterName

[takagi906]

FEATURE REQUEST

1. Please describe the feature you are requesting.
   when i want to create topic, i found it only support brokerAddress, but in java, it support clusterName. When a brokerAddress changed, code will not take effect.

2. Provide any additional detail on your proposed use case for this feature.
   Implemented like Java, convert cluster to IP through functions.

3. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?
   i think it's important because brokerAddress IP may change.

[YaoJusheng]

Does it mean something like the following?

func (a *admin) CreateTopic(ctx context.Context, opts ...OptionCreate) error {
	cfg := defaultTopicConfigCreate()
	for _, apply := range opts {
		apply(&cfg)
	}

	if cfg.BrokerAddr == "" {
		a.cli.GetNameSrv().UpdateTopicRouteInfo(DefaultCluster)
		cfg.BrokerAddr = a.cli.GetNameSrv().FindBrokerAddrByTopic(DefaultCluster)
	}
     //   ...

BTW, What is the reason why rocketmq-client-go has not released a new version? There are many problems in 2.1.2 , which sometimes make it impossible to use directly.