koordlet: optimize if-else logics in cgroup reconcile

[lucming]

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

Base: 67.50% // Head: 67.56% // Increases project coverage by +0.06% 🎉

Coverage data is based on head (64c457d) compared to base (65849ae).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #992      +/-   ##
==========================================
+ Coverage   67.50%   67.56%   +0.06%     
==========================================
  Files         241      246       +5     
  Lines       27982    28149     +167     
==========================================
+ Hits        18889    19019     +130     
- Misses       7793     7825      +32     
- Partials     1300     1305       +5     

Flag	Coverage Δ
unittests	67.56% <100.00%> (+0.06%)	⬆️

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

Impacted Files	Coverage Δ
pkg/koordlet/resmanager/cgroup_reconcile.go	85.85% <100.00%> (-0.44%)	⬇️
pkg/util/cache/expiration_cache.go	74.60% <100.00%> (-1.16%)	⬇️
pkg/scheduler/plugins/loadaware/load_aware.go	73.81% <0.00%> (-3.28%)	⬇️
pkg/scheduler/plugins/coscheduling/core/gang.go	77.28% <0.00%> (-0.95%)	⬇️
...ler/apis/config/validation/validation_loadaware.go	0.00% <0.00%> (ø)
pkg/descheduler/utils/anomaly/types.go	0.00% <0.00%> (ø)
pkg/scheduler/plugins/loadaware/estimator/types.go	0.00% <0.00%> (ø)
pkg/descheduler/utils/anomaly/basic_detector.go	89.24% <0.00%> (ø)
...r/plugins/loadaware/estimator/default_estimator.go	97.91% <0.00%> (ø)
... and 2 more

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[zwzhang0107]

PTAL @saintube

[saintube]

/lgtm

@lucming please revise the title of the PR with the pattern koordlet: xxx

[zwzhang0107]

/assign @FillZpp

[zwzhang0107]

/approve

[jasonliu747]

/lgtm

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FillZpp, jasonliu747, saintube, zwzhang0107

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• pkg/koordlet/OWNERS [jasonliu747,saintube,zwzhang0107]
• pkg/util/OWNERS [FillZpp]

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