Remote XCOM: RuntimeError: This event loop is already running

### Apache Airflow version 3.0.3 ### If "Other Airflow 2 version" selected, which one? _No response_ ### What happened? When I run kubernetes pod operators with XCOM: ```yaml # Store XCOM in the xcom folder - AIRFLOW__CORE__XCOM_BACKEND=airflow.providers.common.io.xcom.backend.XComObjectStorageBackend - AIRFLOW__COMMON_IO__XCOM_OBJECTSTORAGE_PATH=abfs://wasb_default@<container-name>/xcom - AIRFLOW__COMMON_IO__XCOM_OBJECTSTORAGE_THRESHOLD=0 - AIRFLOW_CONN_WASB_DEFAULT=wasb://:@?extra__wasb__account_name=<account-name>extra__wasb__account_key=<account-key> ``` The task runs, the XCOM to Azure Blob Storage is written, but the **task fails with RuntimeError: This event loop is already running**: ```logs RuntimeError: This event loop is already running File "/home/airflow/.local/lib/python3.12/site-packages/airflow/providers/cncf/kubernetes/operators/pod.py", line 680 in execute_sync File "/home/airflow/.local/lib/python3.12/site-packages/airflow/providers/cncf/kubernetes/operators/pod.py", line 611 in await_pod_start File "/usr/local/lib/python3.12/asyncio/base_events.py", line 667 in run_until_complete File "/usr/local/lib/python3.12/asyncio/base_events.py", line 626 in _check_running ``` Notes: - When I run normal tasks (not KubernetesPodTasks) the run succeeds. - The run succeeds when I turn the custom XCOM backend of (`AIRFLOW__COMMON_IO__XCOM_OBJECTSTORAGE_THRESHOLD=-1`). ### What you think should happen instead? https://github.com/apache/airflow/blob/6f1243a6e5bba80a918ab7fc9f4dc2f6beee9330/providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/operators/pod.py#L609 ```py def await_pod_start(self, pod: k8s.V1Pod) -> None: try: async def _await_pod_start(): events_task = self.pod_manager.watch_pod_events(pod, self.startup_check_interval_seconds) pod_start_task = self.pod_manager.await_pod_start( pod=pod, schedule_timeout=self.schedule_timeout_seconds, …