Adjust monitoring for new deployment setup

[bkontur]

• complex relayer was replaced by headers-a, headers-b, parachains-a, parachains-b, messages-a, messages-b
• adjust dashboards
• add equivocation stuff to monitoring
• check why data are empty:
  

[svyatonik]

@bkontur Most of dashboards are working fine. E.g.:

This "No data" is maybe because the metric name has changed to e.g. at_BridgeHubKusama_relay_BridgeHubPolkadotMessages_balance. But probably we should remove it at all - there are no any alerts attached and now we have 3 different relayer accounts on each chain. Idk

[bkontur]

• fix Relay balances at metric:

I see now, why all the dashboards are empty for metric:
Relay balances at RococoBridgeHub
Relay balances at WestendBridgeHub
Relay balances at KusamaBridgeHub
Relay balances at PolkadotBridgeHub

Because we run add_relay_balances_metrics only for complex relay here.

We don't run those metrics for standalone relaying: relayer-headers or relay-parachains or relay-messages.

It would be nice to add those metrics for all relayings as on-demand, so the relayer can say with cli argument to add or not those metrics.

Till the time we fix this (or remove those alerts/dashboards), I am pausing those alerts: