airflow 2.3.1rc1 - every run of the KPOA give : ERROR - Unclosed client session

[raphaelauv]

Describe the bug

[2022-05-21 22:47:04,754] {triggerer_job.py:359} INFO - Trigger <astronomer.providers.cncf.kubernetes.triggers.wait_container.WaitContainerTrigger kubernetes_conn_id=None, hook_params={'cluster_context': None, 'config_file': '/usr/local/airflow/include/.kube/config', 'in_cluster': None}, pod_name=airflow-test-pod-d71a41753e984c179fecee07c19ffc92, container_name=base, pod_namespace=default, pending_phase_timeout=120, poll_interval=10> (ID 13) starting
2022-05-21T22:47:04.784309061Z [2022-05-21 22:47:04,783] {base_events.py:1744} ERROR - Unclosed client session
2022-05-21T22:47:04.784356405Z client_session: <aiohttp.client.ClientSession object at 0x7f60b3734af0>
2022-05-21T22:47:13.799346307Z [2022-05-21 22:47:13,798] {triggerer_job.py:252} INFO - 1 triggers currently running
2022-05-21T22:47:34.865841637Z [2022-05-21 22:47:34,865] {triggerer_job.py:362} INFO - Trigger <astronomer.providers.cncf.kubernetes.triggers.wait_container.WaitContainerTrigger kubernetes_conn_id=None, hook_params={'cluster_context': None, 'config_file': '/usr/local/airflow/include/.kube/config', 'in_cluster': None}, pod_name=airflow-test-pod-d71a41753e984c179fecee07c19ffc92, container_name=base, pod_namespace=default, pending_phase_timeout=120, poll_interval=10> (ID 13) fired: TriggerEvent<{'status': 'done'}>

To Reproduce
airflow 2.3.1rc1
astronomer-providers[cncf.kubernetes]==1.3.0
apache-airflow-providers-cncf-kubernetes==4.0.2

Expected behavior
it should not log ERROR - Unclosed client session at every run of the KPOA

[kaxil]

cc @pankajastro @dstandish