chore: cleanup resmanager

[saintube]

Signed-off-by: saintube saintube@foxmail.com

Ⅰ. Describe what this PR does

cleanup for koordlet/resmanager

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

[koordinator-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

Merging #383 (adb9e4c) into main (dab5a92) will increase coverage by 0.06%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##             main     #383      +/-   ##
==========================================
+ Coverage   66.50%   66.56%   +0.06%     
==========================================
  Files         116      116              
  Lines       11669    11668       -1     
==========================================
+ Hits         7760     7767       +7     
+ Misses       3308     3300       -8     
  Partials      601      601              

Flag	Coverage Δ
unittests	66.56% <14.28%> (+0.06%)	⬆️

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

Impacted Files	Coverage Δ
pkg/util/feature.go	0.00% <0.00%> (ø)
pkg/koordlet/resmanager/resmanager.go	56.66% <100.00%> (ø)
pkg/koordlet/runtimehooks/reconciler/reconciler.go	78.94% <0.00%> (+7.36%)	⬆️

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[jasonliu747]

/lgtm