[IMP] point_of_sale: set sales team from pos config

When an invoice is set on a pos config, it is not set on the invoice
generatde from a pos order.

So we are now storing the pos config sale team on the invoice instead of
the default sales team.

TASK-ID: 1998051

closes odoo/odoo#33985

Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>