performance(kcmas): lock optimize

[zzzzhhb]

What type of PR is this?

Performance

What this PR does / why we need it:

optimize the lock logic in kcmas store.

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (1882504) 53.43% compared to head (1bf41eb) 53.51%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #343      +/-   ##
==========================================
+ Coverage   53.43%   53.51%   +0.07%     
==========================================
  Files         434      436       +2     
  Lines       47563    47911     +348     
==========================================
+ Hits        25415    25639     +224     
- Misses      19295    19400     +105     
- Partials     2853     2872      +19     

Flag	Coverage Δ
unittest	53.51% <98.22%> (+0.07%)	⬆️

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Files	Coverage Δ
pkg/custom-metric/store/local/local_store.go	70.09% <100.00%> (+1.01%)	⬆️
pkg/custom-metric/store/data/cache.go	96.18% <99.07%> (+1.24%)	⬆️
pkg/custom-metric/store/data/internal/internal.go	89.74% <96.29%> (ø)

... and 18 files with indirect coverage changes

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