Refresh properties on KubernetesPodOperator when k8s fails due to token expiration

[paolo-moriello]

Closes: #32718

---

The KubernetesPodOperator caches the hook and client used to interact with K8S. This includes also the kube config and related secret auth token. For long running jobs, the token may expire during the execution, causing the job to fail:

Traceback (most recent call last):
  [...]
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/airflow/providers/cncf/kubernetes/utils/pod_manager.py", line 690, in read_pod
    return self._client.read_namespaced_pod(pod.metadata.name, pod.metadata.namespace)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/api/core_v1_api.py", line 23483, in read_namespaced_pod
    return self.read_namespaced_pod_with_http_info(name, namespace, **kwargs)  # noqa: E501
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/api/core_v1_api.py", line 23570, in read_namespaced_pod_with_http_info
    return self.api_client.call_api(
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/api_client.py", line 348, in call_api
    return self.__call_api(resource_path, method,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/api_client.py", line 180, in __call_api
    response_data = self.request(
                    ^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/api_client.py", line 373, in request
    return self.rest_client.GET(url,
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/rest.py", line 240, in GET
    return self.request("GET", url,
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/airflow/.local/lib/python3.11/site-packages/kubernetes/client/rest.py", line 234, in request
    raise ApiException(http_resp=r)
kubernetes.client.exceptions.ApiException: (401)
Reason: Unauthorized
HTTP response body: {"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"Unauthorized","reason":"Unauthorized","code":401}

This PR builds on top of #32719. Before adding more tests, I'd be happy to discuss this or other approaches to solve this issue.

[amoghrajesh]

Mostly looks good, small nits