[FIX] stock: fix traceability smartbutton domain

`product_id.product_tmpl_id` expects ids of `product.template`
while `products.ids` are ids of `product.product`.

This is an oversight during the migration to the new API of this
module in the below revision:
b9853db8b5

opw-687444

addons/stock/models/product.py

@@ -504,7 +504,7 @@ class ProductTemplate(models.Model):
         action = self.env.ref('stock.act_product_stock_move_open').read()[0]
         if self:
             action['context'] = {'default_product_id': products.ids[0]}
-        action['domain'] = [('product_id.product_tmpl_id', 'in', products.ids)]
+        action['domain'] = [('product_id.product_tmpl_id', 'in', self.ids)]
         return action