### Apache Airflow version

2.6.0

### What happened

Worker pod template file doesn't have an option to add priorityClassName. 

### What you think should happen instead

Airflow workers deployment however has the option to add it via the override airflow.workers.priorityClassName . We should reuse this for the worker pod template file too.

### How to reproduce

Trying to add a priorityClassName for airflow worker pod doesnt work. Unless we override the whole worker pod template with our own. But that is not preferrable as we will need to duplicate a lot of the existing template file. 

### Operating System

Rhel8

### 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?

- [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)

docs = render_chart(
            values={
                "executor": "KubernetesExecutor",
                "workers": {
                    "affinity": {
                        "nodeAffinity": {
                            "requiredDuringSchedulingIgnoredDuringExecution": {
                                "nodeSelectorTerms": [
                                    {
                                        "matchExpressions": [
                                            {"key": "foo", "operator": "In", "values": ["true"]},
                                        ]
                                    }
                                ]
                            }
                        }
                    },
                    "tolerations": [
                        {"key": "dynamic-pods", "operator": "Equal", "value": "true", "effect": "NoSchedule"}
                    ],
                    "topologySpreadConstraints": [
                        {
                            "maxSkew": 1,
                            "topologyKey": "foo",
                            "whenUnsatisfiable": "ScheduleAnyway",
                            "labelSelector": {"matchLabels": {"tier": "airflow"}},