koord-descheduler: fixes namespace object limiter

[songtao98]

Ⅰ. Describe what this PR does

Currently, if user uses evictAllBarePods to evict a bare pod, the namespace object limiter cannot get its ownerRef to add a limiterKey for this pod's namespace. This lead to the namespace limiter for bare pods does not work.

This PR fixes namespace object limiter for koord-descheduler's MigrationController.

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

Attention: Patch coverage is 69.23077% with 4 lines in your changes missing coverage. Please review.

Project coverage is 67.68%. Comparing base (e15a68c) to head (04ed872).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/descheduler/controllers/migration/util/util.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2160      +/-   ##
==========================================
- Coverage   67.69%   67.68%   -0.02%     
==========================================
  Files         446      446              
  Lines       42686    42694       +8     
==========================================
- Hits        28898    28896       -2     
- Misses      11269    11277       +8     
- Partials     2519     2521       +2     

Flag	Coverage Δ
unittests	67.68% <69.23%> (-0.02%)	⬇️

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[hormes]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hormes

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• pkg/descheduler/OWNERS [hormes]

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[koordinator-bot]

New changes are detected. LGTM label has been removed.