Add attribute for SubscriptionGroupConfig

[drpmma]

Which Issue(s) This PR Fixes

Fixes #6889

Brief Description

Add attribute for SubscriptionGroupConfig like TopicConfig

How Did You Test This Change?

Unit test

[codecov-commenter]

Codecov Report

Merging #6891 (94f9896) into develop (91d8ee1) will decrease coverage by 0.05%.
The diff coverage is 17.17%.

@@              Coverage Diff              @@
##             develop    #6891      +/-   ##
=============================================
- Coverage      42.67%   42.63%   -0.05%     
+ Complexity      9111     9107       -4     
=============================================
  Files           1125     1127       +2     
  Lines          79875    79910      +35     
  Branches       10383    10387       +4     
=============================================
- Hits           34087    34067      -20     
- Misses         41520    41569      +49     
- Partials        4268     4274       +6     

Impacted Files	Coverage Δ
...e/rocketmq/common/SubscriptionGroupAttributes.java	0.00% <0.00%> (ø)
...pache/rocketmq/common/attribute/AttributeUtil.java	0.00% <0.00%> (ø)
...ols/command/consumer/UpdateSubGroupSubCommand.java	0.00% <0.00%> (ø)
...protocol/subscription/SubscriptionGroupConfig.java	50.44% <44.44%> (-0.04%)	⬇️
.../broker/subscription/SubscriptionGroupManager.java	66.46% <80.00%> (+1.36%)	⬆️
...ache/rocketmq/broker/topic/TopicConfigManager.java	54.49% <100.00%> (-4.10%)	⬇️

... and 24 files with indirect coverage changes

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[xdkxlk]

LGTM

[mxsm]

LGTM