koordlet: require gc started for cacheable update

[saintube]

Ⅰ. Describe what this PR does

To avoid memory leaks, require the cache GC to be started when the executor invokes cache updating.

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: 66.66% and project coverage change: +0.03 🎉

Comparison is base (150d96e) 67.23% compared to head (0226bdd) 67.26%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1078      +/-   ##
==========================================
+ Coverage   67.23%   67.26%   +0.03%     
==========================================
  Files         255      255              
  Lines       28622    28634      +12     
==========================================
+ Hits        19243    19260      +17     
+ Misses       8038     8036       -2     
+ Partials     1341     1338       -3     

Flag	Coverage Δ
unittests	67.26% <66.66%> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
pkg/koordlet/resourceexecutor/executor.go	42.95% <64.28%> (+10.10%)	⬆️
pkg/koordlet/resmanager/cgroup_reconcile.go	85.85% <100.00%> (ø)
pkg/koordlet/resmanager/system_config.go	59.64% <0.00%> (-10.53%)	⬇️
pkg/util/httputil/reverseproxy.go	84.84% <0.00%> (-0.27%)	⬇️
pkg/koordlet/resourceexecutor/updater.go	43.42% <0.00%> (+0.79%)	⬆️
pkg/scheduler/plugins/coscheduling/core/gang.go	77.91% <0.00%> (+0.94%)	⬆️

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[hormes]

/lgtm

[zwzhang0107]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zwzhang0107

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• pkg/koordlet/OWNERS [zwzhang0107]

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