[Enhancement] Support disable netty server worker group by config

[lizhimins]

Before Creating the Enhancement Request

• 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:

after:
Note: After modification, the write traffic slightly increased by test framework, resulting in a larger write value here