Add watcher for table that need locking
This MR adds a Elastic Watcher for table lock status
The link in the Slack Manager is going to https://log.gprd.gitlab.net/app/r/s/508tx . The job is run 3 times a week. The alert will run every hour and looks back for 24 hours. So if the schedule changes, it should not affect this watcher.
If the Database::MonitorLockedTablesWorker
reports that one or more tables need locking, we send a Slack alert to #g_tenant-scale Slack channel
Related issue gitlab-org/gitlab#413654 (closed)
Edited by Rutger Wessels