* add alert test send feature * update doc * add alarm instance test send ui * update * fix mvn * fix test * update * update * change to rpc * fix ut * fix ut * update * update * change result * update * Update docs/docs/en/guide/alert/alert_plugin_user_guide.md Co-authored-by: Aaron Wang <wangweirao16@gmail.com> --------- Co-authored-by: Aaron Wang <wangweirao16@gmail.com>