[FIX] l10n_ch: QR-Invoice don't work for LI customers

Issue :
- Liechtenstein adapted the same QR-Invoice as Switzerland.
However, Odoo only allows the issuance of QR-Invoices to
swiss customers

https://www.llb.li/en/private/paying-and-saving/payment-services/qr-bill#:~:text=Standing%20orders%20based%20on%20orange%20payment%20slips%20can%20no%20longer%20be%20processed%20after%2030%20September%202022.%20Therefore%2C%20these%20standing%20orders%20need%20to%20be%20newly%20set%20up%20on%20the%20basis%20of%20QR%20bills

.

Fix:
- Allow LI users to be issued QR-Invoices

OPW-2977644

closes odoo/odoo#100470

Related: odoo/enterprise#34168
Signed-off-by: Josse Colpaert <jco@odoo.com>