koord-scheduler: fix root quota when deleted

[shaloulcy]

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: 100.00% and project coverage change: -0.02% ⚠️

Comparison is base (f3b3eb4) 66.05% compared to head (3ced184) 66.03%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1678      +/-   ##
==========================================
- Coverage   66.05%   66.03%   -0.02%     
==========================================
  Files         384      384              
  Lines       41454    41462       +8     
==========================================
- Hits        27384    27381       -3     
- Misses      12059    12063       +4     
- Partials     2011     2018       +7     

Flag	Coverage Δ
unittests	66.03% <100.00%> (-0.02%)	⬇️

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

Files Changed	Coverage Δ
...kg/scheduler/plugins/elasticquota/quota_handler.go	76.53% <100.00%> (+0.99%)	⬆️

... and 3 files with indirect coverage changes

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[hormes]

/lgtm

[eahydra]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eahydra

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• pkg/scheduler/OWNERS [eahydra]

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