[FIX] stock: group by in Packages
[FIX] stock: group by in Packages

Location and Company are non-stored fields. Therefore, grouping by these
fields leads to a traceback.

opw-779564

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo