proposal: support Job-level preemption

[xulinfei1996]

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ad36a0b) 67.27% compared to head (8cbc460) 67.55%.
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1879      +/-   ##
==========================================
+ Coverage   67.27%   67.55%   +0.27%     
==========================================
  Files         411      413       +2     
  Lines       45875    46072     +197     
==========================================
+ Hits        30863    31122     +259     
+ Misses      12775    12696      -79     
- Partials     2237     2254      +17     

Flag	Coverage Δ
unittests	67.55% <ø> (+0.27%)	⬆️

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.

[eahydra]

/lgtm

[hormes]

/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hormes

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

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [hormes]

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