This code was a mess. Now it's less of a mess and user UserDbDataManager now.
Fixes the following bugs:
* If you connect to a server, restart your client, connect again in the same round, you role bans would not be visible in the client.
* If you role ban somebody who is not connected to the server, then they connect within the round, they will only have the recently-applied ban.
Likely fixes#24781, #27282
