[FIX] l10n_de: add shipping address to invoice report

With this commit, we add the shipping address
to the invoice report when it is different from
the invoicing address.
We do the same way as in l10n_de_sale/models/sale.py
and l10n_de_purchase/models/purchase.py,
by adding the computed field l10n_de_addresses
in account_move.

Steps:

- Insltall l10n_de and sale
- Set Customer addresses in settings
- Ensure that DIN5008 is set as document layout
- Create and confirm an invoice with delivery
  address different than invoicing address
- Print or preview invoice
-> Shipping address does not appear on report

opw-3090418

closes odoo/odoo#108675

Signed-off-by: Brice Bartoletti (bib) <bib@odoo.com>

addons/l10n_de/models/account_move.py

@@ -7,6 +7,7 @@ class AccountMove(models.Model):
 
     l10n_de_template_data = fields.Binary(compute='_compute_l10n_de_template_data')
     l10n_de_document_title = fields.Char(compute='_compute_l10n_de_document_title')
+    l10n_de_addresses = fields.Binary(compute='_compute_l10n_de_addresses')
 
     def _compute_l10n_de_template_data(self):
         for record in self:
@@ -38,3 +39,14 @@ class AccountMove(models.Model):
                 record.l10n_de_document_title = _('Vendor Credit Note')
             elif record.move_type == 'in_invoice':
                 record.l10n_de_document_title = _('Vendor Bill')
+
+    def _compute_l10n_de_addresses(self):
+        for record in self:
+            record.l10n_de_addresses = data = []
+            if record.partner_shipping_id == record.partner_id:
+                data.append((_("Invoicing and Shipping Address:"), record.partner_shipping_id))
+            elif record.move_type in ("in_invoice", "in_refund"):
+                data.append((_("Invoicing and Shipping Address:"), record.partner_id))
+            else:
+                data.append((_("Shipping Address:"), record.partner_shipping_id))
+                data.append((_("Invoicing Address:"), record.partner_id))