[IMP][14.0] enable negative invoices for italian localization

[sergiocorato]

Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:

---

I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

[rvalyi]

if the goal is to get it merged, it would probably be better to test if the company_id.country_id.code is in ("IT",) or something similar to avoid being lenient in other countries where it should be blocked.

[sergiocorato]

if the goal is to get it merged, it would probably be better to test if the company_id.country_id.code is in ("IT",) or something similar to avoid being lenient in other countries where it should be blocked.

Good hint, fixed.

[rvalyi]

technically not an Odoo backport but not a big change either so LGTM.

[pedrobaeza]

This kind of changes shouldn't be done here. OCB is not for this. Apart from the ugly hack checking country, this will create a difference experience using Vanilla Odoo or OCB. This should be done on an extra module.

[sergiocorato]

This kind of changes shouldn't be done here. OCB is not for this. Apart from the ugly hack checking country, this will create a difference experience using Vanilla Odoo or OCB. This should be done on an extra module.

Fixed the ugly part, I think. I opened a PR on 16.0 version too, ASAP I'll do on Odoo.

[pedrobaeza]

The other part of the reasoning is still blocking.