[ISSUE #8283] Simplify the code related to cold reading control service

[weihubeats]

https://github.com/apache/rocketmq/issues/8283

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 47.97%. Comparing base (53a3f69) to head (01b53f3).

Files with missing lines	Patch %	Lines
.../rocketmq/broker/coldctr/ColdDataCgCtrService.java	0.00%	3 Missing :warning:

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8284      +/-   ##
=============================================
- Coverage      48.13%   47.97%   -0.17%     
+ Complexity     12022    11984      -38     
=============================================
  Files           1308     1308              
  Lines          92253    92252       -1     
  Branches       11808    11808              
=============================================
- Hits           44410    44260     -150     
- Misses         42355    42487     +132     
- Partials        5488     5505      +17     

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[weihubeats]

maybe this pr can merge

[weihubeats]

@lizhimins Can you help review this PR