### 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)

"""Retrieves xcom value and kills xcom sidecar container"""
        result = self.pod_manager.extract_xcom(pod)
        if isinstance(result, str) and result.rstrip() == "__airflow_xcom_result_empty__":
            self.log.info("Result file is empty.")
            return None
        else:
            self.log.info("xcom result: \n%s", result)
            return json.loads(result)
    def execute(self, context: Context):
        """Based on the deferrable parameter runs the pod asynchronously or synchronously"""
        if self.deferrable:
            self.execute_async(context)
        else:
            return self.execute_sync(context)
    def execute_sync(self, context: Context):
        try:
            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.remote_pod = self.find_pod(self.pod.metadata.namespace, context=context)
            self.await_pod_start(pod=self.pod)
            if self.get_logs:
                self.pod_manager.fetch_container_logs(
                    pod=self.pod,