Show orders with line items + finalized orders

[jibees]

What? Why?

Closes #8221

The aim of this PR is to return by the API (and then display in the /admin/orders interface) the following orders:

• the ones that contains at least one line item (whatever theirs state)
• the finalized orders. Ie. the orders with state : complete canceled resumed awaiting_return returned

What should we test?

1. Create an order
2. Delete all line items using BOM
3. see the order does not appear anymore on /admin/orders

Order with no line items AND with state not finalized (ie. address, cart, payment) must not be display

Release notes

In the /admin/orders display all the finalized orders and the not empty orders.

Changelog Category: User facing changes

[andrewpbrett]

I think this can go to Test with one review given the severity

[filipefurtad0]

Hey @jibees ,

Indeed, after staging this PR complete orders, are displayed too, after removing the last item:

Cancelled orders are also shown:

Resumed orders appear as well:

Shipped orders and Returned orders are never empty - you can't ship an empty order and returned orders retain their initial line items on it.

Please note that these orders have the potential to break things:

• state = complete and shipment_state = NULL -> [Release Blocker] Payment and shipping state displayed as NONE in the UI (after cash payment) -> causing Payment reports to break  #7494
• empty orders cannot be viewed by customers -> Error 500 - Customer viewing an edited order from which all items were removed #5505

But this is not introduced by this PR and relates rather to #8131.

Thanks for this fix @jibees - Ready to go.