refactor: simplify the code of reconciler for comment and optimize performance

[guqing]

What type of PR is this?

/kind improvement
/area core
/milestone 2.14.x

What this PR does / why we need it:

优化评论控制器的实现逻辑以优化代码和性能

Resolves #5435

how to test it?

• 测试删除评论时能正确连同回复一起删除
• 测试评论下的最新回复的已读功能是否正确
• 删除/审核评论,观察主题端和Console端分别显示的评论数量是否正确

Does this PR introduce a user-facing change?

None

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.3% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 36.78161% with 55 lines in your changes are missing coverage. Please review.

Project coverage is 56.55%. Comparing base (5fdf6c0) to head (5cbd22d).
Report is 61 commits behind head on main.

Files	Patch %	Lines
...n/halo/app/content/comment/CommentServiceImpl.java	0.00%	15 Missing ⚠️
...run/halo/app/content/comment/ReplyServiceImpl.java	0.00%	15 Missing ⚠️
...p/core/extension/reconciler/CommentReconciler.java	65.71%	10 Missing and 2 partials ⚠️
...ava/run/halo/app/metrics/ReplyEventReconciler.java	0.00%	7 Missing ⚠️
...vent/post/CommentUnreadReplyCountChangedEvent.java	0.00%	4 Missing ⚠️
.../app/core/extension/reconciler/PostReconciler.java	0.00%	1 Missing ⚠️
...ore/extension/reconciler/SinglePageReconciler.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5504      +/-   ##
============================================
- Coverage     56.91%   56.55%   -0.36%     
+ Complexity     3319     3310       -9     
============================================
  Files           587      591       +4     
  Lines         18968    19182     +214     
  Branches       1401     1353      -48     
============================================
+ Hits          10795    10849      +54     
- Misses         7594     7774     +180     
+ Partials        579      559      -20     

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[JohnNiang]

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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