### 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)

:param image_pull_secrets: Any image pull secrets to be given to the pod.
        If more than one secret is required, provide a
        comma separated list: secret_a,secret_b
    :param service_account_name: Name of the service account
    :param is_delete_operator_pod: What to do when the pod reaches its final
        state, or the execution is interrupted. If True (default), delete the
        pod; if False, leave the pod.
    :param hostnetwork: If True enable host networking on the pod.
    :param tolerations: A list of kubernetes tolerations.
    :param security_context: security options the pod should run with (PodSecurityContext).
    :param container_security_context: security options the container should run with.
    :param dnspolicy: dnspolicy for the pod.
    :param schedulername: Specify a schedulername for the pod
    :param full_pod_spec: The complete podSpec
    :param init_containers: init container for the launched Pod
    :param log_events_on_failure: Log the pod's events if a failure occurs
    :param do_xcom_push: If True, the content of the file
        /airflow/xcom/return.json in the container will also be pushed to an
        XCom when the container completes.
    :param pod_template_file: path to pod template file (templated)
    :param priority_class_name: priority class name for the launched Pod
    :param pod_runtime_info_envs: (Optional) A list of environment variables,
        to be set in the container.
    :param termination_grace_period: Termination grace period if task killed in UI,
        defaults to kubernetes default
    :param configmaps: (Optional) A list of names of config maps from which it collects ConfigMaps
        to populate the environment variables with. The contents of the target
        ConfigMap's Data field will represent the key-value pairs as environment variables.
        Extends env_from.
    :param base_container_name: The name of the base container in the pod. This container's logs