[I] [Enhancement] Support disable netty server worker group by config [rocketmq]

[via GitHub]

lizhimins opened a new issue, #8720:
URL: https://github.com/apache/rocketmq/issues/8720

   ### Before Creating the Enhancement Request
   
   - [X] I have confirmed that this should be classified as an enhancement 
rather than a bug/feature.
   
   
   ### Summary
   
   Support disable netty server worker group by config to improve broker 
performance and reduce context switching
   
   ### Motivation
   
   Improve broker performance and reduce context switching
   
   ### Describe the Solution You'd Like
   
   Support disable netty server worker group by config to improve broker 
performance and reduce context switching
   
   ### Describe Alternatives You've Considered
   
   Support use default worker by config. According to our test report, the 
broker overall cpu usage of the modified broker decreased by 15-20%, and 
context switching decreased by 40%
   
   ### Additional Context
   
   before:
   
![image](https://github.com/user-attachments/assets/d770acae-90a1-467b-89e3-f971fcf39b5d)
   
   after:
   
![image](https://github.com/user-attachments/assets/dde809f9-f946-49d7-9ca6-8353f6de8c20)


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