[FIX] account: correct account domain

- Create a child company B in parent company A
- Go to company A
- Create an invoice, create a payment (less than the invoice)
- Open the payment matching widget
- Associate the invoice and the payment, add a line for the open balance

It is possible to choose accounts from company B.

This is due to an incorrect forward-port of commit fb48e497.
It was valid in v11 but needed to be changed in v12.

Fixes #39533
opw-2116411

closes odoo/odoo#39847

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>