koord-manager: fix node slo extension got overwriten

[zwzhang0107]

Ⅰ. Describe what this PR does

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: 81.81% and project coverage change: -0.03% ⚠️

Comparison is base (5c4340f) 65.02% compared to head (3112044) 64.99%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1552      +/-   ##
==========================================
- Coverage   65.02%   64.99%   -0.03%     
==========================================
  Files         352      352              
  Lines       36198    36200       +2     
==========================================
- Hits        23536    23528       -8     
- Misses      10924    10931       +7     
- Partials     1738     1741       +3     

Flag	Coverage Δ
unittests	64.99% <81.81%> (-0.03%)	⬇️

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

Files Changed	Coverage Δ
pkg/slo-controller/nodeslo/extender_plugin.go	78.72% <80.00%> (-1.28%)	⬇️
pkg/slo-controller/nodeslo/nodeslo_controller.go	47.71% <100.00%> (ø)

... and 3 files with indirect coverage changes

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[saintube]

/lgtm

[jasonliu747]

/lgtm

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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