Added tests pkg/scheduler/core/common.go

[anujagrawal699]

Description:
This PR introduces comprehensive unit tests for the common scheduling functions in the scheduler package. The new tests aim to improve code reliability, maintainability, and overall test coverage for core scheduling operations.

Additions:

1. pkg/scheduler/core/common_test.go

Test Coverage:

1. pkg/scheduler/core/common_test.go : 0% to 95.20%
   This is can be verified in pkg/scheduler/core directory using

go test ./... -coverprofile=coverage.out
go tool cover -html=coverage.out -o coverage.html

What type of PR is this?
/kind feature

Which issue(s) this PR fixes:
Fixes a part of #5470

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.65%. Comparing base (6b18b6e) to head (5dc2355).
Report is 40 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5646      +/-   ##
==========================================
+ Coverage   35.19%   36.65%   +1.45%     
==========================================
  Files         645      648       +3     
  Lines       44869    45079     +210     
==========================================
+ Hits        15792    16522     +730     
+ Misses      27846    27315     -531     
- Partials     1231     1242      +11     

Flag	Coverage Δ
unittests	36.65% <ø> (+1.45%)	⬆️

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[zhzhuang-zju]

/assign

[zhzhuang-zju]

others LGTM

[zhzhuang-zju]

/lgtm
thanks for your work, and ask @XiShanYongYe-Chang for another look

[XiShanYongYe-Chang]

Thanks
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: XiShanYongYe-Chang

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• pkg/scheduler/OWNERS [XiShanYongYe-Chang]

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