Expose assignReplicas and selectClusters function to external schedulers

[chaosi-zju]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Expose assignReplicas and selectClusters function to external schedulers

Which issue(s) this PR fixes:

Fixes #4279

Special notes for your reviewer:

@wangyang0616

Does this PR introduce a user-facing change?:

none

[codecov-commenter]

Codecov Report

Attention: 34 lines in your changes are missing coverage. Please review.

Comparison is base (bf1098b) 52.80% compared to head (bd46fcd) 52.78%.
Report is 4 commits behind head on master.

Files	Patch %	Lines
pkg/scheduler/core/common.go	0.00%	31 Missing ⚠️
pkg/scheduler/core/generic_scheduler.go	0.00%	3 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4293      +/-   ##
==========================================
- Coverage   52.80%   52.78%   -0.03%     
==========================================
  Files         240      241       +1     
  Lines       23624    23628       +4     
==========================================
- Hits        12474    12471       -3     
- Misses      10471    10477       +6     
- Partials      679      680       +1     

Flag	Coverage Δ
unittests	52.78% <0.00%> (-0.03%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jwcesign]

/lgtm

[XiShanYongYe-Chang]

Is it sufficient to only export this method based on the description of the issue?

[chaosi-zju]

Is it sufficient to only export this method based on the description of the issue?

They just need assignReplicas and selectClusters, they are not concerned with the implementation details of these two functions, they just want to import what we updated.

[whitewindmills]

I don't know if these two exposed functions meet your requirements. @wangyang0616

[RainbowMango]

Please rebase this as we just introduced license check by #4204. A license header is required now for each Go file.

[wangyang0616]

I don't know if these two exposed functions meet your requirements. @wangyang0616

The current pr can help us complete the reference of the scheduling policy. Thanks.

[RainbowMango]

/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/scheduler/OWNERS [RainbowMango]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment