koord-manager: revise slo-controllers, fix for deleted node

[saintube]

Ⅰ. Describe what this PR does

revise the slo-controller and fix some bugs:

1. fix the case when a node is deleted but nodeSLO or nodeMetric exists
2. use a copy of the node when updating the node resources to avoid cache pollution

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: 66.96% // Head: 66.98% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (9bb82db) compared to base (388f7ad).
Patch coverage: 49.27% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #961      +/-   ##
==========================================
+ Coverage   66.96%   66.98%   +0.02%     
==========================================
  Files         243      243              
  Lines       28240    28245       +5     
==========================================
+ Hits        18910    18920      +10     
+ Misses       8035     8030       -5     
  Partials     1295     1295              

Flag	Coverage Δ
unittests	66.98% <49.27%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
...o-controller/config/colocation_cm_event_handler.go	75.86% <ø> (ø)
pkg/slo-controller/config/config.go	92.75% <ø> (ø)
pkg/slo-controller/nodeslo/nodeslo_controller.go	46.45% <4.76%> (ø)
...slo-controller/nodemetric/nodemetric_controller.go	51.85% <12.50%> (-0.49%)	⬇️
...controller/noderesource/noderesource_controller.go	36.47% <55.55%> (-0.88%)	⬇️
pkg/slo-controller/noderesource/noderesource.go	76.17% <85.18%> (-0.23%)	⬇️
...ontroller/noderesource/nodemetric_event_handler.go	90.90% <100.00%> (ø)
pkg/koordlet/runtimehooks/reconciler/reconciler.go	67.05% <0.00%> (+5.29%)	⬆️

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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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• pkg/slo-controller/OWNERS [zwzhang0107]

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