[I] [Enhancement] NettyRemotingClient#createChannelAsync一开始的get操作是冗余的 [rocketmq]

[via GitHub]

PleaseGiveMeTheCoke opened a new issue, #9081:
URL: https://github.com/apache/rocketmq/issues/9081

   ### Before Creating the Enhancement Request
   
   - [X] I have confirmed that this should be classified as an enhancement 
rather than a bug/feature.
   
   
   ### Summary
   
   createChannelAsync方法的一开始 ，执行了get操作
   
![image](https://github.com/user-attachments/assets/4d19c372-a994-439d-8bdf-b6ccfd03f978)
   而createChannelAsync方法的调用方**getAndCreate**ChannelAsync方法中，已经执行过同样的get操作了。这段 
get 操作不应该在 createChannelAsync方法中进行，因为这个方法的命名是 **create**ChannelAsync。
   
   
![image](https://github.com/user-attachments/assets/271b14ce-68b6-420e-8f56-cc8ff7a3230d)
   
   
   
   ### Motivation
   
   1. 目前getAndCreateChannelAsync方法相当于执行了两次同样的get操作
   2. 目前createChannelAsync的方法命名和具体职责存在不一致
   3. 优化后可以提升性能（少了一次get操作），提高代码的可读性
   
   ### Describe the Solution You'd Like
   
   删除下面的代码
   
![image](https://github.com/user-attachments/assets/90e86627-9bee-45de-98bf-5a2219c2764a)
   
   并在该方法的另一处调用方getAndCreateNameserverChannelAsync中，调用之前加上get操作
   
   
![image](https://github.com/user-attachments/assets/9c878a95-9ac0-49ad-b062-958f949efdff)
   
   
   ### Describe Alternatives You've Considered
   
   无
   
   ### Additional Context
   
   _No response_


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