[FIX] website_sale: filter fiscal positions on company

When creating a cart on the website, the website company was not
considered which could end up with the selection of a fiscal position
linked to a wrong company since the method is called in sudo.

closes odoo/odoo#31673

Signed-off-by: Rémi Rahir (rar) <rar@odoo.com>

addons/website_sale/models/sale_order.py

@@ -399,7 +399,7 @@ class Website(models.Model):
                 country_code = request.session['geoip'].get('country_code')
                 if country_code:
                     country_id = request.env['res.country'].search([('code', '=', country_code)], limit=1).id
-                    fp_id = request.env['account.fiscal.position'].sudo()._get_fpos_by_region(country_id)
+                    fp_id = request.env['account.fiscal.position'].sudo().with_context(force_company=request.website.company_id.id)._get_fpos_by_region(country_id)
                     sale_order.fiscal_position_id = fp_id
                 else:
                     # if no geolocation, use the public user fp