[IMP] point_of_sale,pos_restaurant: use company's barcode nomenclature

This change removes the `barcode_nomenclature_id` in the `pos.config`.
Each pos session now starts based on the company's barcode nomenclature.

closes odoo/odoo#93072

Task-id: 2849415
Related: odoo/upgrade#3575
Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>