Feat: optimize log flag

[Somefive]

Signed-off-by: Yin Da yd219913@alibaba-inc.com

[codecov]

Codecov Report

Base: 90.54% // Head: 90.36% // Decreases project coverage by -0.19% ⚠️

Coverage data is based on head (7a7c469) compared to base (6dc6228).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 7a7c469 differs from pull request most recent head a84df55. Consider uploading reports for the commit a84df55 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   90.54%   90.36%   -0.19%     
==========================================
  Files          49       49              
  Lines        1492     1007     -485     
==========================================
- Hits         1351      910     -441     
+ Misses        102       58      -44     
  Partials       39       39              

Flag	Coverage Δ
unit-test	90.36% <100.00%> (-0.19%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
util/log/flag.go	100.00% <100.00%> (ø)
util/net/http.go	50.00% <0.00%> (-5.56%)	⬇️
controller/client/timeout_client.go	92.85% <0.00%> (-2.23%)	⬇️
cue/cuex/error.go	77.77% <0.00%> (-2.23%)	⬇️
multicluster/client.go	83.67% <0.00%> (-1.47%)	⬇️
util/compression/data.go	80.00% <0.00%> (-1.40%)	⬇️
util/singleton/client.go	78.94% <0.00%> (-1.06%)	⬇️
cue/util/import.go	77.77% <0.00%> (-0.80%)	⬇️
cue/cuex/runtime/package.go	77.77% <0.00%> (-0.80%)	⬇️
... and 40 more

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