[FIX] delivery: debug loger with new ORM

Using the debug mode on carrier and validate a picking with a
carrier will block and run until request's timeout.

It happens because log_xml create a new cursor and a new environement.
So it should be flush before the ir.logging creation since it's in
another env.

closes odoo/odoo#40561

X-original-commit: cdc09f5b70ad200014ac38f314bf1ec53cd5b8ca
Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>

addons/delivery/models/delivery_carrier.py

@@ -204,6 +204,7 @@ class DeliveryCarrier(models.Model):
         self.ensure_one()
 
         if self.debug_logging:
+            self.flush()
             db_name = self._cr.dbname
 
             # Use a new cursor to avoid rollback that could be caused by an upper method