Setting a default value on a readonly related field without an inverse
method is nonsense. We log some warning when it happens.
We also fixed other cases where a related field has a default value
that overrides the target field's value.
closesodoo/odoo#67762
Related: odoo/enterprise#17313
Signed-off-by: Julien Castiaux <Julien00859@users.noreply.github.com>