Handle canceled workflow as a warning instead of a fail (#24282) (#24292)

Backport #24282 by @wolfogre

Follow what Drone CI does:


![image](https://user-images.githubusercontent.com/9418365/233829853-d1c30a30-10cc-4b97-a134-793a79d46d85.png)

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

services/actions/commit_status.go

@@ -137,8 +137,10 @@ func toCommitStatus(status actions_model.Status) api.CommitStatusState {
 	switch status {
 	case actions_model.StatusSuccess, actions_model.StatusSkipped:
 		return api.CommitStatusSuccess
-	case actions_model.StatusFailure, actions_model.StatusCancelled:
+	case actions_model.StatusFailure:
 		return api.CommitStatusFailure
+	case actions_model.StatusCancelled:
+		return api.CommitStatusWarning
 	case actions_model.StatusWaiting, actions_model.StatusBlocked:
 		return api.CommitStatusPending
 	case actions_model.StatusRunning: