### 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)

follow=True,
                    post_termination_timeout=self.POST_TERMINATION_TIMEOUT,
                )
            else:
                self.pod_manager.await_container_completion(
                    pod=self.pod, container_name=self.base_container_name
                )
            if self.do_xcom_push:
                self.pod_manager.await_xcom_sidecar_container_start(pod=self.pod)
                result = self.extract_xcom(pod=self.pod)
            self.remote_pod = self.pod_manager.await_pod_completion(self.pod)
        finally:
            self.cleanup(
                pod=self.pod or self.pod_request_obj,
                remote_pod=self.remote_pod,
            )
        ti = context["ti"]
        ti.xcom_push(key="pod_name", value=self.pod.metadata.name)
        ti.xcom_push(key="pod_namespace", value=self.pod.metadata.namespace)
        if self.do_xcom_push:
            return result
    def execute_async(self, context: Context):
        self.pod_request_obj = self.build_pod_request_obj(context)
        self.pod = self.get_or_create_pod(  
            pod_request_obj=self.pod_request_obj,
            context=context,
        )
        self.convert_config_file_to_dict()
        self.invoke_defer_method()
    def convert_config_file_to_dict(self):