[FIX] stock: incorrect domain
[FIX] stock: incorrect domain

The field `parent_id` has been removed in
https://github.com/odoo/odoo/commit/809605bb8f16cf1398ff5070ec0d5bd568aef343#diff-807e5ce512b0669468b040be7a9c470fL236

Therefore, `child_of` cannot be used anymore.

Closes #26850
opw-1883655

closes odoo/odoo#27083
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo