The post_execute(context, result) the Result is None

### Apache Airflow version Other Airflow 2/3 version (please specify below) ### If "Other Airflow 2/3 version" selected, which one? 3.0.6 ### What happened? As the Airflow customer, we want to override the post_execute() function from BaseOperator. We are using the KubernetesPodOperator, to run some bash code. The bash code writes the xcom JSON file into /airflow/xcom/return.json. And already set do_xcom_push: True Everything works good in Airflow 2.10.4, but after we upgrade to Airflow 3.0.6. There is some issue post_execute(context: Any, result: Any) The result is None, but we can see the JSON value in the Airflow UI -> Xcom. The context in the post_execute(), the taskInstance satus still be RUNNING ### What you think should happen instead? As the Airflow Behaviour in 2.10.4, when the airflow call post_execute(context: Any, result: Any) it will provide the XCOM json from /airflow/xcom/return.json But it is None in Airflow 3.0.6 ### How to reproduce 1. Define the task based on KubernetesPodOperator 2. do_push_xcom: True 3. In the KubernetesPodOperator, cmds to echo the JSON file to /airflow/xcom/return.json 4. Define the function for post_execute(context: Any, result: Any) Check the result value and task instance status in post_execute() function ### Operating System Openshift with Redhat ### Versions of Apache Airflow Providers apache-airflow==3.0.6 ### Deployment Other Docker-based deployment ### Deployment details _No response_ ### Anything else? _No response_ ### Are you willing to submit PR? - [x] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)