[FIX] account_check_printing: print check of payment group

When some bills are not paid, some with due date, some without, when registering the payment of these bills as a group payment with checks, it is not possible to print the check

To reproduce the error:
(Need account)
1. Go to Invoicing > Vendors > Bills
2. Create a new one
    - Add at least one line
    - Add the Payment Terms
3. Save & Post
4. Duplicate it, then Save & Post
5. Go back to Bills
6. Select the two bills
7. Click on Action > Register Payment
8. Select Checks, enable Group Payment
9. Click on Create Payment
10. Click on Print Check
11. Click on Print

=> An Odoo Error is raised

The user should be able to print it.

OPW-2389368

closes odoo/odoo#62365

X-original-commit: adeebc5d
Signed-off-by: adwid <adwid@users.noreply.github.com>