Automatically load the SLO rules into prometheus

[hatchan]

When using am start we should also add the rules for the SLO's.

These alerting rules can be used in the following way:

• Startup a alertmanager instance
• Have the alertmanager monitor the prometheus instance
• Once an alert happens route this to am
• Expose this event in websocket connection

Explorer can then connect to this ws connection and then show something in the UI once it happens.

Alternatively we can add the monitoring of these metrics directly to am but that can still expose the event through a ws connection.