[8.0] JobStatus: allow WAITING -> KILLED

[fstagni]

closes #7264

BEGINRELEASENOTES

*WMS
FIX: JobStatus: allow WAITING -> KILLED

ENDRELEASENOTES

[DIRACGridBot]

Sweep summary

Sweep ran in https://github.com/DIRACGrid/DIRAC/actions/runs/6783247652

Failed:

• integration
  cherry-pick 157cd6c into integration failed
  check merge conflicts on a local copy of this repository

  git fetch upstream
  git checkout upstream/integration -b cherry-pick-2-157cd6c32-integration
  git cherry-pick -x -m 1 157cd6c32
  # Fix the conflicts
  git cherry-pick --continue
  git commit --amend -m 'sweep: #7276 JobStatus: allow WAITING -> KILLED' --author='fstagni <[email protected]>'
  git push -u origin cherry-pick-2-157cd6c32-integration
  
  # If you have the GitHub CLI installed the PR can be made with
  gh pr create \
       --label 'sweep:from rel-v8r0' \
       --base integration \
       --repo DIRACGrid/DIRAC \
       --title '[sweep:integration] JobStatus: allow WAITING -> KILLED' \
       --body 'Sweep #7276 `JobStatus: allow WAITING -> KILLED` to `integration`.
  
  Adding original author @fstagni as watcher.
  
  BEGINRELEASENOTES
  
  *WMS
  FIX: JobStatus: allow WAITING -> KILLED
  
  ENDRELEASENOTES
  Closes #7281'