Refactor commit status for Actions jobs (#23786) (#24060)

Backport #23786

Refactor commit status for Actions jobs (#23786)

Highlights:
- Treat `StatusSkipped` as `CommitStatusSuccess` instead of
`CommitStatusFailure`, so it fixed #23599.
- Use the bot user `gitea-actions` instead of the trigger as the creator
of commit status.
- New format `<run_name> / <job_name> / (<event>)` for the context of
commit status to avoid conflicts.
- Add descriptions for commit status.
- Add the missing calls to `CreateCommitStatus`.
- Refactor `CreateCommitStatus` to make it easier to use.

Co-authored-by: Jason Song <i@wolfogre.com>

routers/api/actions/runner/runner.go

@@ -149,10 +149,7 @@ func (s *Service) UpdateTask(
 		return nil, status.Errorf(codes.Internal, "load job: %v", err)
 	}
 
-	if err := actions_service.CreateCommitStatus(ctx, task.Job); err != nil {
-		log.Error("Update commit status for job %v failed: %v", task.Job.ID, err)
-		// go on
-	}
+	actions_service.CreateCommitStatus(ctx, task.Job)
 
 	if req.Msg.State.Result != runnerv1.Result_RESULT_UNSPECIFIED {
 		if err := actions_service.EmitJobsIfReady(task.Job.RunID); err != nil {