### 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)

"""Will fetch and emit events from pod"""
        with _optionally_suppress(reraise=reraise):
            for event in self.pod_manager.read_pod_events(pod).items:
                self.log.error("Pod Event: %s - %s", event.reason, event.message)
    def process_pod_deletion(self, pod: k8s.V1Pod, *, reraise=True):
        with _optionally_suppress(reraise=reraise):
            if pod is not None:
                if self.is_delete_operator_pod:
                    self.log.info("Deleting pod: %s", pod.metadata.name)
                    self.pod_manager.delete_pod(pod)
                else:
                    self.log.info("Skipping deleting pod: %s", pod.metadata.name)
    def _build_find_pod_label_selector(self, context: Context | None = None, *, exclude_checked=True) -> str:
        labels = self._get_ti_pod_labels(context, include_try_number=False)
        label_strings = [f"{label_id}={label}" for label_id, label in sorted(labels.items())]
        labels_value = ",".join(label_strings)
        if exclude_checked:
            labels_value += f",{self.POD_CHECKED_KEY}!=True"
        labels_value += ",!airflow-worker"
        return labels_value
    @staticmethod
    def _set_name(name: str | None) -> str | None:
        if name is not None:
            validate_key(name, max_length=220)
            return re.sub(r"[^a-z0-9-]+", "-", name.lower())
        return None
    def patch_already_checked(self, pod: k8s.V1Pod, *, reraise=True):