Use flags for create post (#28857)

* Use flags for create post

* Remove unintended file

* Fix unintended change and types

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/platform/services/sharedchannel/sync_recv.go

@@ -385,7 +385,7 @@ func (scs *Service) upsertSyncPost(post *model.Post, targetChannel *model.Channe
 			return nil, fmt.Errorf("post sync failed: %w", ErrRemoteIDMismatch)
 		}
 
-		rpost, appErr = scs.app.CreatePost(rctx, post, targetChannel, true, true)
+		rpost, appErr = scs.app.CreatePost(rctx, post, targetChannel, model.CreatePostFlags{TriggerWebhooks: true, SetOnline: true})
 		if appErr == nil {
 			scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Created sync post",
 				mlog.String("post_id", post.Id),