Validate custom project metric query
When a user enters a custom Prometheus project query, we should fire it against the Prometheus server to ensure it is still valid. If it is not, we should warn the user to fix the query.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
When a user enters a custom Prometheus project query, we should fire it against the Prometheus server to ensure it is still valid. If it is not, we should warn the user to fix the query.