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