koord-scheduler: fix PodGroupController panic when init

[eahydra]

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

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

[buptcozy]

/LGTM

[codecov]

Codecov Report

Base: 68.85% // Head: 68.84% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (71ef0cd) compared to base (92b281a).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #659      +/-   ##
==========================================
- Coverage   68.85%   68.84%   -0.02%     
==========================================
  Files         203      203              
  Lines       22909    22908       -1     
==========================================
- Hits        15775    15770       -5     
- Misses       6036     6039       +3     
- Partials     1098     1099       +1     

Flag	Coverage Δ
unittests	68.84% <100.00%> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
...eduler/plugins/coscheduling/controller/podgroup.go	70.29% <100.00%> (-2.12%)	⬇️

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[jasonliu747]

/lgtm

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