Currently, POS-allowed employees can manage cash:
- at the opening (cash control)
- on cash payment
Now, after adding the mananger role, it is possible for an employee to
open the cash register. In the settings of a `pos_config`, you can add
employees with a "basic" role and with a "manager" role, the latter
grants the same rights as a classic odoo manager user.
closesodoo/odoo#122287
Related: odoo/upgrade#4700
Signed-off-by: Guilliams Adrien (adgu) <adgu@odoo.com>