### 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)

with self.dag_maker(dag_id="dag") as dag:
            operator.dag = dag
        dr = self.dag_maker.create_dagrun(run_id="test")
        (ti,) = dr.task_instances
        ti.map_index = map_index
        self.dag_run = dr
        context = ti.get_template_context(session=self.dag_maker.session)
        self.dag_maker.session.commit()  
        remote_pod_mock = MagicMock()
        remote_pod_mock.status.phase = "Succeeded"
        remote_pod_mock.metadata.name = TEST_NAME
        remote_pod_mock.metadata.namespace = TEST_NAMESPACE
        self.await_pod_mock.return_value = remote_pod_mock
        operator.execute_complete(
            context=context,
            event={
                "status": "success",
                "message": TEST_SUCCESS_MESSAGE,
                "name": TEST_NAME,
                "namespace": TEST_NAMESPACE,
            },
        )
        return remote_pod_mock
    @patch(KUB_OP_PATH.format("convert_config_file_to_dict"))
    @patch(KUB_OP_PATH.format("build_pod_request_obj"))
    @patch(KUB_OP_PATH.format("get_or_create_pod"))
    def test_async_create_pod_should_execute_successfully(self, mocked_pod, mocked_pod_obj, mocked_conf_file):