feat:support stat reporting path aggregation.

[SkyeBeFreeman]

fixes #588

[codecov]

Codecov Report

Attention: Patch coverage is 56.00000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 20.02%. Comparing base (1ca6a8b) to head (bcc6ec6).
Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
...ins/stat/prometheus/plugin/PrometheusReporter.java	37.50%	5 Missing ⚠️
...at/prometheus/handler/PrometheusHandlerConfig.java	25.00%	3 Missing ⚠️
...plugins/stat/prometheus/handler/CommonHandler.java	83.33%	2 Missing ⚠️
...java/com/tencent/polaris/api/utils/ClassUtils.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #612      +/-   ##
============================================
- Coverage     20.46%   20.02%   -0.44%     
- Complexity      833      904      +71     
============================================
  Files           334      361      +27     
  Lines         13233    14820    +1587     
  Branches       1702     1854     +152     
============================================
+ Hits           2708     2968     +260     
- Misses        10171    11487    +1316     
- Partials        354      365      +11     

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[shedfreewu]

OK