chore: refactor selector match

[zirain]

fixes: #6677

[zirain]

cc @jukie

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.02%. Comparing base (2488496) to head (8ddef22).
⚠️ Report is 19 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/utils/labels/match.go	66.66%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6702      +/-   ##
==========================================
+ Coverage   71.00%   71.02%   +0.02%     
==========================================
  Files         224      225       +1     
  Lines       39621    39620       -1     
==========================================
+ Hits        28132    28142      +10     
+ Misses       9828     9819       -9     
+ Partials     1661     1659       -2     

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[zirain]

looks like this refactor break zone aware routing