[FIX] website_sale: browse fiscal position in sudo

The tax mapping is only readable by internal users. As the calling
method can be used by portal routes, we should browse the fiscal position
in sudo mode.

closes odoo/odoo#54524

X-original-commit: 46e9a9683967600c55bf43895740fff1d61eb49b
Signed-off-by: Christophe Simonis <chs@odoo.com>
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/website_sale/models/product.py

@@ -283,7 +283,7 @@ class ProductTemplate(models.Model):
             product = self.env['product.product'].browse(combination_info['product_id']) or self
 
             tax_display = self.user_has_groups('account.group_show_line_subtotals_tax_excluded') and 'total_excluded' or 'total_included'
-            fpos = self.env['account.fiscal.position'].get_fiscal_position(partner.id)
+            fpos = self.env['account.fiscal.position'].get_fiscal_position(partner.id).sudo()
             taxes = fpos.map_tax(product.sudo().taxes_id.filtered(lambda x: x.company_id == company_id), product, partner)
 
             # The list_price is always the price of one.