[FIX] models: ignore dependencies of fields inherited from custom fields

When adding a custom field, the ORM also adds it to all the inherits'ed
models, but with the state `base`, because those inherited fields are
automatic (created by the ORM).  However, dependencies are enforced for
`base` fields, while they can be ignored for `manual` ones.  This is a
problem when a custom field is fucked up: its inherited fields will make
the registry crash.

We fix the issue by not enforcing dependency check on fields inherits'ed
from custom fields.

opw-2191114

closes odoo/odoo#44958

X-original-commit: 05ad62e4
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>