Add betzy.sigma2.no to production infra and dashboards

[lars-t-hansen]

Marcin is adding Sonar to the standard setup on the Betzy compute nodes and data ingestion on naic-monitor is already working. Data are likely to be flaky for a while as things are being debugged but it is good to just do the exercise of adding betzy to the setup. We have documentation for what needs to be done; this will be a chance to debug it.

• system config info (or nothing will work)
• dashboard-2
• dashboard
• ...