cleanup: move pkg/tool/cache to pkg/util/cache

[saintube]

Signed-off-by: saintube [email protected]

Ⅰ. Describe what this PR does

Move pkg/tool/cache dir to pkg/util/cache.

Ⅱ. Does this pull request fix one issue?

discussed in #844 (comment)

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

[saintube]

/cc @zwzhang0107 @jasonliu747 @FillZpp

[jasonliu747]

/lgtm

[codecov]

Codecov Report

Base: 66.44% // Head: 66.46% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (fd6289e) compared to base (5b240e0).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #877      +/-   ##
==========================================
+ Coverage   66.44%   66.46%   +0.01%     
==========================================
  Files         233      233              
  Lines       26523    26523              
==========================================
+ Hits        17624    17628       +4     
+ Misses       7669     7662       -7     
- Partials     1230     1233       +3     

Flag	Coverage Δ
unittests	66.46% <ø> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
pkg/koordlet/executor/resource_update_executor.go	29.57% <ø> (ø)
pkg/koordlet/resmanager/resmanager.go	54.33% <ø> (ø)
pkg/koordlet/util/resourceexecutor/executor.go	39.66% <ø> (ø)
pkg/util/cache/expiration_cache.go	75.75% <ø> (ø)
pkg/util/httputil/reverseproxy.go	85.63% <0.00%> (+0.26%)	⬆️
pkg/koordlet/statesinformer/states_pods.go	56.73% <0.00%> (+2.12%)	⬆️

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[FillZpp]

/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files:

• pkg/koordlet/OWNERS [jasonliu747]
• pkg/util/OWNERS [FillZpp]

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[FillZpp]

/milestone v1.1