Introduce a NetworkBridgeEvent::UpdatedAuthorityIds

[rphmeier]

The current network logic doesn't handle the ability for peers to update their authority IDs (i.e. key rotation) very well. The network bridge should be continually updating its known authority IDs for each peer ID and informing subsystems of any changes so they can adapt accordingly.

[Szegoo]

@rphmeier I will attempt this issue.

[bkchr]

BTW, it can also happen the other way around, the peerid for an authorityid changes. Both sides can change and peerid can also change much more often than the authorityid.

[ordian]

BTW, it can also happen the other way around, the peerid for an authorityid changes

That would imply that the node with an old PeerId will disconnect and with the new one connect. We already track AuthorityId changes on connection/disconnection.