### Apache Airflow version

2.5.2

### What happened

Not sure if this is a feature not a bug, but I can use KubernetesPodOperator fine without setting a kubernetes_conn_id.
For example:
```
start = KubernetesPodOperator(
        namespace="mynamespace",
        cluster_context="mycontext",
        security_context={ 'runAsUser': 1000 },
        name="hello",
        image="busybox",
        image_pull_secrets=[k8s.V1LocalObjectReference('prodregistry')],
        cmds=["sh", "-cx"],
        arguments=["echo Start"],
        task_id="Start",
        in_cluster=False,
        is_delete_operator_pod=True,
        config_file="/home/airflow/.kube/config",
    )
```

But if I add deferrable=True to this it won't work. It seems to require an explicit kubernetes_conn_id (which we don't configure).

Is not possible to the deferrable version to work as the non deferrable one?

### What you think should happen instead

I hoped that kpo deferrable would work the same as non deferrable.

### How to reproduce

Use KPO with deferrable=True but no kubernetes_conn_id setting

### Operating System

Debian 11

### Versions of Apache Airflow Providers

_No response_

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

log_message = "This should return no timestamp"
        timestamp, line = self.pod_manager.parse_log_line(log_message)
        assert timestamp is None
        assert line == log_message
        real_timestamp = "2020-10-08T14:16:17.793417674Z"
        timestamp, line = self.pod_manager.parse_log_line(" ".join([real_timestamp, log_message]))
        assert timestamp == pendulum.parse(real_timestamp)
        assert line == log_message
    def test_parse_invalid_log_line(self, caplog):
        with caplog.at_level(logging.INFO):
            self.pod_manager.parse_log_line("2020-10-08T14:16:17.793417674ZInvalidmessage\n")
        assert "Invalidmessage" in caplog.text
        assert "no timestamp in message" in caplog.text
    @mock.patch("airflow.providers.cncf.kubernetes.utils.pod_manager.PodManager.run_pod_async")
    def test_start_pod_retries_on_409_error(self, mock_run_pod_async):
        mock_run_pod_async.side_effect = [
            ApiException(status=409),
            mock.MagicMock(),
        ]
        self.pod_manager.create_pod(mock.sentinel)
        assert mock_run_pod_async.call_count == 2
    @mock.patch("airflow.providers.cncf.kubernetes.utils.pod_manager.PodManager.run_pod_async")
    def test_start_pod_fails_on_other_exception(self, mock_run_pod_async):
        mock_run_pod_async.side_effect = [ApiException(status=504)]
        with pytest.raises(ApiException):
            self.pod_manager.create_pod(mock.sentinel)
    @mock.patch("airflow.providers.cncf.kubernetes.utils.pod_manager.PodManager.run_pod_async")
    def test_start_pod_retries_three_times(self, mock_run_pod_async):