[FIX] point_of_sale: access to rounding
[FIX] point_of_sale: access to rounding

- Create a user with only Point of Sale / User rights
- Open a POS session

An AccessError is raised on `account.cash.rounding`.

We add he access right: the user should be able to read the cash
rounding configuration.

opw-2258719

closes odoo/odoo#51816

X-original-commit: 61915c33e4e0e7979d10dee01fa80a6511498f33
Signed-off-by: pimodoo <16075eed7f0f1db85d54c35d23e6589f4efb5038@users.noreply.github.com>
Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo