[FIX] base: consider advanced cases for automatic check_company domain.

Those cases are already checked in models._check_company() but not considered
when defining the default domain on `check_company=True` fields.

* Consider res_users relational field
	Companies allowed for user = user.company_ids
* Consider company-dependent fields
	Companies allowed = self.env.company

closes odoo/odoo#40724

Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>