Update Grafana dashboard with ASB metrics

[martivj]

Description

The current Grafana dashboard includes an overview of the Azure Storage Queues (ASQ) setup. Now that we are in the middle of replacing ASQ with Azure Service Bus (ASB), the we should update the dashboard to inspect the state of the ASB queues as well.

We should take inspiration from the Dialogporten team, where they have set up a dedicated ASB board as well as a TV friendly health overview. That way we don't need to clutter everything into one board, and instead have more focused ones with only the relevant information for each component, while not sacrificing readability on the TV overview.

Acceptance Criteria

• New dashboard focused entirely on ASB metrics
• New TV friendly health overview dashboard for office screens
• Updated main events dashboard if we need it

[martivj]

In progress on the hosted Grafana instance at Home/Dashboards/Core/Events/

• Events - Azure Service Bus
• Events - Health Overview