### 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)

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
        will appear as part of this task's logs if get_logs is True. Defaults to None. If None,
        will consult the class variable BASE_CONTAINER_NAME (which defaults to "base") for the base
        container name to use.
    :param deferrable: Run operator in the deferrable mode.
    :param poll_interval: Polling period in seconds to check for the status. Used only in deferrable mode.
    """
    
    BASE_CONTAINER_NAME = "base"
    POD_CHECKED_KEY = "already_checked"
    template_fields: Sequence[str] = (
        "image",
        "cmds",
        "arguments",
        "env_vars",
        "labels",
        "config_file",
        "pod_template_file",
        "namespace",
        "container_resources",
        "volumes",
        "volume_mounts",
    )
    template_fields_renderers = {"env_vars": "py"}
    def __init__(