debian/gdm3.gdm-smartcard-sssd-or-password.pam: Always load gnome keyring and nologin

Ensure that we load the nologin and gnome-key-ring modules also if sss
module succeeded. To do this without code repetition we need to use
common-auth as a substack but this is fine here, while another
implementation could have been:

auth    [success=ok default=3] pam_sss.so allow_missing_name try_cert_auth
auth    requisite       pam_nologin.so
auth    optional        pam_gnome_keyring.so
auth    sufficient      pam_permit.so

@include common-auth
auth    requisite       pam_nologin.so
auth    optional        pam_gnome_keyring.so