[FIX] point_of_sale: do not block if no COA
[FIX] point_of_sale: do not block if no COA

In case the COA is imported in the system, the `chart_template_id` of
the company remains empty while the accounting is usable. However, in
this case it's impossible to open a POS session.

We leave the warning in the POS config but avoid blocking the user.

opw-2286640

closes odoo/odoo#53994

X-original-commit: c73b241c5e8c269e1ebc4f517cc270d90b2e44ca
Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>

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