Rudder

We have a lot of differente loggers to log things about authentication, authorization, users, oidc, etc.
This is a mess that makes thing hard to change.

We need to normalize around only one logger: application.authentication

Loggers that should be migrated are at least:
- application.authorization
- application.user
- org.springframework.security.RudderProviderManager (because it's more linked to rudder authentication process than spring internals)

Perhaps there is others.

We should for now keep the auth-backends logger for the authentication backend plugin.
And user management should use the common logger.