fix: Load segment task promote failed

[weiliu1031]

issue: #30816
pr: #31430

pr #31319 introduce the logic that segment checker need to load level zero segment which only exist in current target.

This PR fix load segment task promote failed when segment only belongs to current target

[mergify]

@weiliu1031

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[mergify]

@weiliu1031 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[czs007]

/approve
/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: czs007, weiliu1031

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.16%. Comparing base (5649b9a) to head (7790654).
Report is 3 commits behind head on 2.4.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #31431      +/-   ##
==========================================
+ Coverage   81.08%   81.16%   +0.08%     
==========================================
  Files         980      980              
  Lines      143453   143453              
==========================================
+ Hits       116316   116433     +117     
+ Misses      23248    23133     -115     
+ Partials     3889     3887       -2     

Files	Coverage Δ
internal/querycoordv2/task/scheduler.go	84.06% <100.00%> (+1.25%)	⬆️

... and 41 files with indirect coverage changes