GitLab staging: turn on azure container insights and audit event logging
This MR does a few things:
- add an option to push OMS ("operations management suite") data to a log analytics workspace in the kubernetes module
- enable diagnostics for auditing when the log analytics workspace is enabled
- set up a log analytics workspace, with Container Insights, in the GitLab module
- and enable all of this for the GitLab Staging instance.
This may give us enough logging to diagnose what's going on with the flaky gitlab operator upgrades ?