### 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)

"""
        Waits for the given container in the given pod to be completed
        :param pod: pod spec that will be monitored
        :param container_name: name of the container within the pod to monitor
        """
        while not self.container_is_terminated(pod=pod, container_name=container_name):
            time.sleep(1)
    def await_pod_completion(self, pod: V1Pod) -> V1Pod:
        """
        Monitors a pod and returns the final state
        :param pod: pod spec that will be monitored
        :return: tuple[State, str | None]
        """
        while True:
            remote_pod = self.read_pod(pod)
            if remote_pod.status.phase in PodPhase.terminal_states:
                break
            self.log.info("Pod %s has phase %s", pod.metadata.name, remote_pod.status.phase)
            time.sleep(2)
        return remote_pod
    def parse_log_line(self, line: str) -> tuple[DateTime | None, str]: