### 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)

schedulername: str | None = None,
        full_pod_spec: k8s.V1Pod | None = None,
        init_containers: list[k8s.V1Container] | None = None,
        log_events_on_failure: bool = False,
        do_xcom_push: bool = False,
        pod_template_file: str | None = None,
        priority_class_name: str | None = None,
        pod_runtime_info_envs: list[k8s.V1EnvVar] | None = None,
        termination_grace_period: int | None = None,
        configmaps: list[str] | None = None,
        base_container_name: str | None = None,
        deferrable: bool = False,
        poll_interval: float = 2,
        **kwargs,
    ) -> None:
        
        
        if isinstance(kwargs.get("resources"), k8s.V1ResourceRequirements):
            raise AirflowException(
                "Specifying resources for the launched pod with 'resources' is deprecated. "
                "Use 'container_resources' instead."
            )
        
        
        if "node_selectors" in kwargs:
            raise ValueError(
                "Param `node_selectors` supplied. This param is no longer supported. "
                "Use `node_selector` instead."
            )
        super().__init__(**kwargs)