[FIX] point_of_sale: accept GS1 barcodes in PoS

This update enables PoS to handle GS1 barcodes, which was
previously not possible even though the GS1 nomenclature could
be selected. GS1 barcodes can now be used to extract product
identifiers, lot numbers, and serial numbers from the code.

opw-3204299

closes odoo/odoo#122257

Signed-off-by: Joseph Caburnay (jcb) <jcb@odoo.com>