[FIX] mrp: don't copy locked state
[FIX] mrp: don't copy locked state

When copying a done MO that is unlocked, the new MO is also unlocked and
the buttons to produce/check availability aren't displayed and it is
confusing to the user.

Fixes #20119

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