load Client Configuration from auth-less url on FES

[tomholub]

Today we use GET <fes>/api/v1/account/ which requires authentication with an access token or OIDC.

For now we could keep the access token request during setup as is (in case it's needed for other endpoints later like logging), however when actually grabbing OrgRules from the FES, we should use GET <fes>/api/v1/client-configuration?domain=example.com API instead.

The new API is missing FcAccount$info which contains default_message_expire which has to be thought about further.