Fix and issue that would prevent a correct ID Token from being generated for users who start off anonymous. This also avoids generating one in the first place for anonymous users.
This moves the OpenID Connect storage from memory into the SQL storage, making it persistent and allowing it to be used with clustered deployments like the rest of Authelia.
This ensures that; the method set when a user does not have a preference is a method that is available, that if a user has a preferred method that is not available it is changed to an enabled method with preference put on methods the user has configured, that the frontend does not show the method selection option when only one method is available.
