This prevents a bunch of queries that are useless when creating a
record. Indeed, right after a record has been created, no other record
has a many2one reference to it. In other words, inversing a many2one
field from the record just created always gives an empty recordset.
Those useless inversions generate about a dozen queries when creating a
`res.partner`, for instance.
This saves queries, but not much time.
closesodoo/odoo#36566
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>