[MM-43073] broadcast post unread websocket when CRT off (#19927)

* [MM-43073] broadcast post unread websocket with CRT off

* clean up debug

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/channel.go

@@ -2715,6 +2715,8 @@ func (a *App) markChannelAsUnreadFromPostCRTUnsupported(postID string, userID st
 	if nErr != nil {
 		return channelUnread, model.NewAppError("MarkChannelAsUnreadFromPost", "app.channel.update_last_viewed_at_post.app_error", nil, nErr.Error(), http.StatusInternalServerError)
 	}
+	a.sendWebSocketPostUnreadEvent(channelUnread, postID, false)
+	a.UpdateMobileAppBadge(userID)
 	return channelUnread, nil
 }