### Apache Airflow Provider(s)

cncf-kubernetes

### Versions of Apache Airflow Providers

apache-airflow-providers-cncf-kubernetes==5.2.1

### Apache Airflow version

2.5.1

### Operating System

Arch Linux

### Deployment

Other

### Deployment details

_No response_

### What happened

Not really showing a failure in operation, but the code in the [`KubernetesPodOperator._render_nested_template_fields`](https://github.com/apache/airflow/blob/d26dc223915c50ff58252a709bb7b33f5417dfce/airflow/providers/cncf/kubernetes/operators/kubernetes_pod.py#L373-L403) function could be improved.

The current code is formed by 6 conditionals checking the type of the `content` variable. Even when the 1st of the succeed, the other 5 conditionals are still checked, which is inefficient because the function could end right there, saving time and resources.


### What you think should happen instead

The conditionals flow could be fixed with a simple map, using a dictionary to immediately get the value or fallback to the default one.

### How to reproduce

There is no bug _per se_ to reproduce. It's just making the code cleaner and more efficient, avoiding to keep computing conditionals even when the condition has been resolved.

### Anything else

_No response_

### Are you willing to submit PR?

- [X] 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)

hostnetwork: bool = False,
        tolerations: list[k8s.V1Toleration] | None = None,
        security_context: dict | None = None,
        container_security_context: dict | None = None,
        dnspolicy: str | None = None,
        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: