[FIX] delivery: consistent return type

The original method `put_in_pack` returns a `stock.quant.package`.
Therefore, the override should do so.

Fixes #27636
opw-1912671

closes odoo/odoo#29229

addons/delivery/models/stock_picking.py

@@ -130,7 +130,7 @@ class StockPicking(models.Model):
         current_package_carrier_type = self.carrier_id.delivery_type if self.carrier_id.delivery_type not in ['base_on_rule', 'fixed'] else 'none'
         count_packaging = self.env['product.packaging'].search_count([('package_carrier_type', '=', current_package_carrier_type)])
         if not count_packaging:
-            return False
+            return package
         # By default, sum the weights of all package operations contained in this package
         pack_operation_ids = self.env['stock.pack.operation'].search([('result_package_id', '=', package.id)])
         package_weight = sum([x.qty_done * x.product_id.weight for x in pack_operation_ids])