[FIX] website_sale_delivery: we should be able to pay if the order only contains services

Two use cases must work:
Should hide payment AND display errors when order contains deliverable product

Should show payment AND not display errors when order contains only services (event tickets)

Linked OPW 1864744
Linked PR v11.0 #25679
closes #25692

addons/website_sale_delivery/models/sale_order.py

@@ -95,8 +95,10 @@ class SaleOrder(models.Model):
 
     @api.model
     def _get_errors(self, order):
+        # Do not Forward port in v11.0 as the API was refactored by f9a8c53e485445bc8e3474eb3978b0f83d5645c7
+        has_stockable_products = any(order.order_line.filtered(lambda line: line.product_id.type in ['consu', 'product']))
         errors = super(SaleOrder, self)._get_errors(order)
-        if not order._get_delivery_methods():
+        if not order._get_delivery_methods() and has_stockable_products:
             errors.append(
                 (_('Sorry, we are unable to ship your order'),
                  _('No shipping method is available for your current order and shipping address. '