### 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)

#
#
from __future__ import annotations
import re
from pathlib import Path
from shutil import copyfile, copytree
from tempfile import TemporaryDirectory
import jmespath
import pytest
from tests.charts.helm_template_generator import render_chart
@pytest.fixture(scope="class", autouse=True)
def isolate_chart(request):
    chart_dir = Path(__file__).parents[3] / "chart"
    with TemporaryDirectory(prefix=request.cls.__name__) as tmp_dir:
        temp_chart_dir = Path(tmp_dir) / "chart"
        copytree(chart_dir, temp_chart_dir)
        copyfile(
            temp_chart_dir / "files/pod-template-file.kubernetes-helm-yaml",
            temp_chart_dir / "templates/pod-template-file.yaml",
        )
        request.cls.temp_chart_dir = str(temp_chart_dir)
        yield
class TestPodTemplateFile:
    def test_should_work(self):