[FIX] mrp: UOM on unbuild order
[FIX] mrp: UOM on unbuild order

Keep the same UOM than the MO.

opw-2169377

closes odoo/odoo#43407

X-original-commit: 942154b3140cb3fc92e8aeff0241149e701581a7
Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>

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