koordlet: revise cgroup update err when unsupported or path not exist

[saintube]

Ⅰ. Describe what this PR does

• Revise the error handling when the cgroup resource update fails because the cgroup is unsupported or the file does not exist.

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

Patch coverage: 47.45% and project coverage change: +0.04 🎉

Comparison is base (ca52ffb) 64.49% compared to head (2391957) 64.53%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1339      +/-   ##
==========================================
+ Coverage   64.49%   64.53%   +0.04%     
==========================================
  Files         324      324              
  Lines       33687    33709      +22     
==========================================
+ Hits        21726    21755      +29     
+ Misses      10380    10364      -16     
- Partials     1581     1590       +9     

Flag	Coverage Δ
unittests	64.53% <47.45%> (+0.04%)	⬆️

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

Impacted Files	Coverage Δ
pkg/koordlet/resourceexecutor/cgroup.go	62.68% <ø> (+2.23%)	⬆️
pkg/koordlet/resourceexecutor/updater.go	41.09% <0.00%> (+3.99%)	⬆️
pkg/koordlet/util/system/system_resource.go	65.62% <ø> (ø)
pkg/koordlet/util/system/util_test_tool.go	51.42% <37.50%> (+0.83%)	⬆️
pkg/koordlet/resourceexecutor/executor.go	43.47% <55.00%> (+0.52%)	⬆️

... and 3 files with indirect coverage changes

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[zwzhang0107]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zwzhang0107

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