[FIX] sale: Number of SO linked to an archived article

When archiving a product template P with one SO linked to it,

- Going to P by Accounting > Configuration > Products > P shows 1 sale
in smart button

- Going to P by Accounting > Sellable products > P showed 0 sale in smart
button

Now it shows 1 sale in these two cases.

opw:1852948

addons/sale/models/product_template.py

@@ -24,7 +24,7 @@ class ProductTemplate(models.Model):
     @api.depends('product_variant_ids.sales_count')
     def _sales_count(self):
         for product in self:
-            product.sales_count = sum([p.sales_count for p in product.product_variant_ids])
+            product.sales_count = sum([p.sales_count for p in product.with_context(active_test=False).product_variant_ids])
 
     @api.multi
     def action_view_sales(self):