[banquepopulaire] Handle dematerialization status for subscriptions

If the status (available in the SubscriberPage with the key
`roleUtilisateurCoffreNumerique/code`) of dematerialization is CGDN
(Coffre Gratuit sans contrat de dématérialisation des documents)
that means we cannot gather subscriptions/documents online.

Closes: 46839@sibi