koordlet: optimize auditor UT with httptest.Server

[ZiMengSheng]

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

Merging #382 (3e1627d) into main (b54bb0c) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #382      +/-   ##
==========================================
- Coverage   66.57%   66.55%   -0.02%     
==========================================
  Files         116      116              
  Lines       11580    11580              
==========================================
- Hits         7709     7707       -2     
- Misses       3281     3283       +2     
  Partials      590      590              

Flag	Coverage Δ
unittests	66.55% <100.00%> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
pkg/koordlet/audit/auditor.go	71.42% <100.00%> (ø)
pkg/koordlet/runtimehooks/reconciler/reconciler.go	78.94% <0.00%> (-2.11%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b54bb0c...3e1627d. Read the comment docs.

[jasonliu747]

/lgtm

[eahydra]

/approve

[jasonliu747]

/lgtm

[hormes]

/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eahydra, hormes, jasonliu747

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [hormes]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment