Create commit status when event is pull_request_sync (go-gitea#23683)

Fix: go-gitea#23674
If the type of `hook_event` is `pull_request_sync`, also need to insert
a record of `commit_status` into DB.
Because `pull_request` event and `pull_request_sync` event have the same
payload, so the code is reusable.

Screenshot:

![image](https://user-images.githubusercontent.com/33891828/227465436-1b436807-d0b2-4a2b-8890-09d96c7f666d.png)

models/actions/run.go

@@ -127,7 +127,7 @@ func (run *ActionRun) GetPushEventPayload() (*api.PushPayload, error) {
 }
 
 func (run *ActionRun) GetPullRequestEventPayload() (*api.PullRequestPayload, error) {
-	if run.Event == webhook_module.HookEventPullRequest {
+	if run.Event == webhook_module.HookEventPullRequest || run.Event == webhook_module.HookEventPullRequestSync {
 		var payload api.PullRequestPayload
 		if err := json.Unmarshal([]byte(run.EventPayload), &payload); err != nil {
 			return nil, err

services/actions/commit_status.go

@@ -45,7 +45,7 @@ func CreateCommitStatus(ctx context.Context, job *actions_model.ActionRunJob) er
 
 		sha = payload.HeadCommit.ID
 		creatorID = payload.Pusher.ID
-	case webhook_module.HookEventPullRequest:
+	case webhook_module.HookEventPullRequest, webhook_module.HookEventPullRequestSync:
 		payload, err := run.GetPullRequestEventPayload()
 		if err != nil {
 			return fmt.Errorf("GetPullRequestEventPayload: %w", err)