### 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)

"""The `container_is_running` method is designed to handle an assortment of bad objects
    returned from `read_pod`.  E.g. a None object, an object `e` such that `e.status` is None,
    an object `e` such that `e.status.container_statuses` is None, and so on.  This function
    emits params used in `test_container_is_running` to verify this behavior.
    We create mock classes not derived from MagicMock because with an instance `e` of MagicMock,
    tests like `e.hello is not None` are always True.
    """
    class RemotePodMock:
        pass
    class ContainerStatusMock:
        def __init__(self, name):
            self.name = name
    def remote_pod(running=None, not_running=None):
        e = RemotePodMock()
        e.status = RemotePodMock()
        e.status.container_statuses = []
        for r in not_running or []:
            e.status.container_statuses.append(container(r, False))
        for r in running or []:
            e.status.container_statuses.append(container(r, True))
        return e
    def container(name, running):