The email template had "Carte de crédit" hardcoded regardless of the
actual payment method. The address blocks were also missing the
``address2`` and ``name`` fields.
- Add ``mode_paiement``, ``livraison_nom``, ``facturation_nom``,
``livraison_adresse2``, ``facturation_adresse2`` to
``ConfirmationCommande`` Mailable
- Migration to replace hardcoded payment label with
``{{mode_paiement}}`` and add ``address2`` fields in DB template
- Migration to add ``name`` fields before each address block
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