[FIX] barcodes_gs1_nomenclature: access record with portal

Steps to reproduce:
(Activate Project, Timesheets, Sales, and Inventory)
- connect with portal
- open Projects
- try to open project "AGR - S00021 - Sales Order"

Issue:
Access Error

Cause:
We want to access to the field "is_gs1_nomenclature" for which Portal has no access.

Note:
On the main Runbot (all apps) it does work because the subcontractin_portal adds the Barcode Nomenclature access to Portal user

opw-3073064

closes odoo/odoo#106384

Signed-off-by: Adrien Widart <awt@odoo.com>