[FIX] sale_stock: reconcile refunds from SO

- Create a product P, valuation FIFO automated
- Receive some stock
- Create a SO with 1 unit, validate
- Validate the picking
- Create the invoice, validate
  => the Stock Interim Account (Delivered) entries from the invoice and
     the stock move are reconciled
- Return the picking, choose to update the quantity on SO
- Validate
- From the SO, create the invoice (which is a credit note), validate

The Stock Interim Account (Delivered) entries from the credit note and
the returned stock move are not reconciled. Note that both entries are
properly reconciled if the refund is generated directly from the
original invoice.

When retrieving the stock moves linked to the invoice, we always go
through the `refund_invoice_id` field, which is not filled in this
specific case.

The solution is to search from moves directly from the credit note
itself.

opw-2274731

closes odoo/odoo#53610

X-original-commit: 6aa7e843f427df17bc0845c44ab2345cfa93fb77
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/sale_stock/models/account_move.py

@@ -18,6 +18,8 @@ class AccountMove(models.Model):
             rslt += invoice.mapped('invoice_line_ids.sale_line_ids.move_ids').filtered(lambda x: x.state == 'done' and x.location_dest_id.usage == 'customer')
         for invoice in self.filtered(lambda x: x.move_type == 'out_refund'):
             rslt += invoice.mapped('reversed_entry_id.invoice_line_ids.sale_line_ids.move_ids').filtered(lambda x: x.state == 'done' and x.location_id.usage == 'customer')
+            # Add refunds generated from the SO
+            rslt += invoice.mapped('invoice_line_ids.sale_line_ids.move_ids').filtered(lambda x: x.state == 'done' and x.location_id.usage == 'customer')
         return rslt
 
     def _get_invoiced_lot_values(self):