Return False in is_env_present if importing kubernetes leads to a ModuleNotFoundError

PiperOrigin-RevId: 748440123

Author: yashk2810

jax/_src/clusters/k8s_cluster.py

@@ -34,7 +34,7 @@ def is_env_present(cls) -> bool:
     if 'KUBERNETES_SERVICE_HOST' in os.environ:
       try:
         import kubernetes as k8s  # pytype: disable=import-error
-      except ImportError as e:
+      except (ImportError, ModuleNotFoundError):
         warnings.warn(
           '\n'.join([
             textwrap.fill(