Fix the consume count include the quantity of the system group

[1782935682]

Which Issue(s) This PR Fixes

Fixes #9618

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.00%. Comparing base (e4b731c) to head (6c152fc).
⚠️ Report is 13 commits behind head on develop.

Files with missing lines	Patch %	Lines
...a/org/apache/rocketmq/store/stats/BrokerStats.java	0.00%	2 Missing ⚠️
...pache/rocketmq/store/stats/BrokerStatsManager.java	60.00%	1 Missing and 1 partial ⚠️
...rocketmq/broker/processor/PopMessageProcessor.java	0.00%	0 Missing and 1 partial ⚠️
...he/rocketmq/broker/processor/PopReviveService.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9619      +/-   ##
=============================================
- Coverage      48.10%   48.00%   -0.11%     
+ Complexity     12063    12041      -22     
=============================================
  Files           1313     1313              
  Lines          92771    92839      +68     
  Branches       11862    11870       +8     
=============================================
- Hits           44629    44568      -61     
- Misses         42636    42741     +105     
- Partials        5506     5530      +24     

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