[FIX] stock: edit quant without company id
[FIX] stock: edit quant without company id

Some quant can have no company_id (quant for partner locations).
But when user edit a quant, the stock move `company_id` is based on the
quant's one. As the `company_id` is required for a stock move, we force
to take the `company_id` of the user in case the quant don't have one.

Task #2035465
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo