koord-descheduler: add evict event/metric for Pod during migration

[eahydra]

Signed-off-by: Joseph joseph.t.lee@outlook.com

Ⅰ. Describe what this PR does

1. Add eviction event with reason/pluginName for Pod during migration.
2. Update eviction metric after eviction

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

[eahydra]

/hold

[codecov]

Codecov Report

Base: 66.42% // Head: 66.50% // Increases project coverage by +0.07% 🎉

Coverage data is based on head (c688588) compared to base (3b88616).
Patch coverage: 88.63% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #932      +/-   ##
==========================================
+ Coverage   66.42%   66.50%   +0.07%     
==========================================
  Files         241      241              
  Lines       27908    27925      +17     
==========================================
+ Hits        18539    18571      +32     
+ Misses       8092     8079      -13     
+ Partials     1277     1275       -2     

Flag	Coverage Δ
unittests	66.50% <88.63%> (+0.07%)	⬆️

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

Impacted Files	Coverage Δ
...kg/descheduler/controllers/migration/controller.go	62.15% <75.00%> (+0.35%)	⬆️
...er/framework/plugins/loadaware/utilization_util.go	88.35% <80.00%> (ø)
pkg/descheduler/evictions/evictions.go	90.81% <100.00%> (-0.28%)	⬇️
...duler/framework/plugins/loadaware/low_node_load.go	66.15% <100.00%> (+2.61%)	⬆️
pkg/descheduler/framework/runtime/framework.go	80.20% <100.00%> (+0.20%)	⬆️
pkg/util/httputil/reverseproxy.go	85.10% <0.00%> (+0.79%)	⬆️
pkg/scheduler/plugins/coscheduling/core/gang.go	75.39% <0.00%> (+0.94%)	⬆️
pkg/koordlet/runtimehooks/reconciler/reconciler.go	67.05% <0.00%> (+5.29%)	⬆️

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[eahydra]

/hold cancel
TBR

[zwzhang0107]

/lgtm

[jasonliu747]

/lgtm

[hormes]

/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• pkg/descheduler/OWNERS [hormes]

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