Start the celery task of this operation.

def start(self) -> None:
        """Start the celery task of this operation."""
        kwargs = self.celery_task_context
        # Update we the operation run id
        kwargs['operation_run_id'] = self.id  # pylint:disable=unsupported-assignment-operation

        async_result = celery_app.send_task(
            self.operation.celery_task,
            kwargs=kwargs,
            **self.operation.get_run_params())
        self.celery_task_id = async_result.id
        self.save()