Expected behaviour

A time-off responsible should be able to see the leave-request to validate, even if he is only reponsible and not leave-manager, at least as long as the leave validation is set on 'both' or 'time-off responsible'

Observed behaviour

If the leave validation is set on 'both' (and not on 'time-off responsible' only), the time-off responsible cannot see these leave request in the "To Approve" view, and only the leave-manager can see them.

Problem Root Cause

The issue is coming from a wrong domain definition (cf commit diff).

opw-2595054

closes odoo/odoo#78633

Signed-off-by: Kevin Baptiste <kba@odoo.com>