### 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)

)
                ],
                image_pull_secrets=self.image_pull_secrets,
                service_account_name=self.service_account_name,
                host_network=self.hostnetwork,
                security_context=self.security_context,
                dns_policy=self.dnspolicy,
                scheduler_name=self.schedulername,
                restart_policy="Never",
                priority_class_name=self.priority_class_name,
                volumes=self.volumes,
            ),
        )
        pod = PodGenerator.reconcile_pods(pod_template, pod)
        if not pod.metadata.name:
            pod.metadata.name = _create_pod_id(
                task_id=self.task_id, unique=self.random_name_suffix, max_length=80
            )
        elif self.random_name_suffix:
            
            pod.metadata.name = _add_pod_suffix(pod_name=pod.metadata.name)
        if not pod.metadata.namespace:
            
            
            hook_namespace = self.hook._get_namespace()
            pod_namespace = self.namespace or hook_namespace or self._incluster_namespace or "default"
            pod.metadata.namespace = pod_namespace
        for secret in self.secrets:
            self.log.debug("Adding secret to task %s", self.task_id)
            pod = secret.attach_to_pod(pod)