[FIX] l10n_mx: allow MX to print receipts

To reproduce the error:
(Need MX configuration)
1. Go to Accounting > Customers > Receipts
2. Create a Receipt
3. Post and Print it

Error: An error message is displayed: "Only invoices could be printed."
However, MX should be allowed to print the receipts.

OPW-2456374

closes odoo/odoo#66910

Signed-off-by: Adrien Widart <adwid@users.noreply.github.com>