scheduler: fix partition binpack disorder

[ZiMengSheng]

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

[saintube]

/lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.32%. Comparing base (214f41c) to head (22b5388).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2227      +/-   ##
==========================================
- Coverage   67.32%   67.32%   -0.01%     
==========================================
  Files         453      453              
  Lines       43703    43707       +4     
==========================================
+ Hits        29423    29424       +1     
- Misses      11738    11740       +2     
- Partials     2542     2543       +1     

Flag	Coverage Δ
unittests	67.32% <100.00%> (-0.01%)	⬇️

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