[FIX] account_analytic_default_purchase: access error

- Activate Analytic Accounting
- Set the demo user with only the Purchase User access rights (no
  accounting access rights)
- Create a PO with demo

An AccessError is raised because the user has no access to
`account.analytic.default`.

We can use `sudo` to retrieve the default account. There is no access
rights error on `account_analytic_id` or `analytic_tag_ids` later on.

Fix the `company_id` at the same time.

opw-2171813

closes odoo/odoo#43388

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/account_analytic_default_purchase/models/purchase_order_line.py

@@ -9,7 +9,13 @@ class PurchaseOrderLine(models.Model):
 
     @api.onchange('product_id', 'date_order')
     def _onchange_product_id_date(self):
-        default_analytic_account = self.env['account.analytic.default'].account_get(product_id=self.product_id.id, partner_id=self.order_id.partner_id.id, user_id=self.env.uid, date=self.date_order)
+        default_analytic_account = self.env['account.analytic.default'].sudo().account_get(
+            product_id=self.product_id.id,
+            partner_id=self.order_id.partner_id.id,
+            user_id=self.env.uid,
+            date=self.date_order,
+            company_id=self.company_id.id,
+        )
         if default_analytic_account:
             self.account_analytic_id = default_analytic_account.analytic_id.id
             self.analytic_tag_ids = [(6, 0, default_analytic_account.analytic_tag_ids.ids)]