[ISSUE #6316] Nameserver should choose a master with a larger epoch when there are two masters in controller mode

[RongtongJin]

Make sure set the target branch to develop

What is the purpose of the change

fix #6316

Brief changelog

在Nameserver broker注册逻辑中，已经有以下逻辑保证多个master出现时选topicConfig中stateVersion更大的

因此在Controller模式中，当角色发生变化时，会利用epoch当作stateVersion当作版本号

Verifying this change

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 41.17647% with 10 lines in your changes missing coverage. Please review.

Project coverage is 43.12%. Comparing base (3c770c9) to head (2cdedf4).
Report is 713 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ache/rocketmq/broker/topic/TopicConfigManager.java	16.66%	4 Missing and 1 partial ⚠️
...he/rocketmq/broker/controller/ReplicasManager.java	0.00%	2 Missing ⚠️
...ocketmq/broker/processor/AdminBrokerProcessor.java	0.00%	2 Missing ⚠️
.../broker/subscription/SubscriptionGroupManager.java	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #6317      +/-   ##
=============================================
- Coverage      43.12%   43.12%   -0.01%     
- Complexity      8859     8861       +2     
=============================================
  Files           1094     1094              
  Lines          77284    77293       +9     
  Branches       10085    10090       +5     
=============================================
- Hits           33332    33329       -3     
- Misses         39790    39804      +14     
+ Partials        4162     4160       -2     

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[RongtongJin]

[mxsm]

LGTM~

[TheR1sing3un]

LGTM~