The airflow-search migration is blocked by a failing data-purging DAG. Under the hood,
the dag runs a refinery script with BashOperator (via python_script_executor).
To be able to run refinery scripts k8s, we should add support for KubernetesPodOperator to python_script_executor.
AC:
- The python_script_executor should support both BashOperator and KubernetesPodOperator execution targets.