refactor: replace HasPrefix+TrimPrefix with CutPrefix

[dulanting]

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Comprehensive Summary of your change

Optimize code using a more modern writing style.

Issue being fixed

Fixes #(issue)

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• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.84%. Comparing base (c8c11b4) to head (bbbb7af).
⚠️ Report is 583 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #22520       +/-   ##
===========================================
+ Coverage   45.36%   65.84%   +20.47%     
===========================================
  Files         244     1073      +829     
  Lines       13333   116106   +102773     
  Branches     2719     2931      +212     
===========================================
+ Hits         6049    76450    +70401     
- Misses       6983    35418    +28435     
- Partials      301     4238     +3937     

Flag	Coverage Δ
unittests	65.84% <100.00%> (+20.47%)	⬆️

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

Files with missing lines	Coverage Δ
src/common/secret/request.go	100.00% <100.00%> (ø)
src/lib/q/builder.go	92.46% <100.00%> (ø)
src/pkg/quota/dao/util.go	83.82% <100.00%> (ø)
src/server/middleware/util/util.go	92.85% <100.00%> (ø)

... and 983 files with indirect coverage changes

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