The recent [refactoring of the celery Worker process](https://github.com/apache/airflow/commit/02ce45cafec22a0a80257b2144d99ec8bb41c961) dropped the use of `celery.bin.worker.Worker()`, and switched to using the `celery.app.worker.Worker()` class more directly.

Unfortunately, it was the task of the former to format the [Celery hostname patterns](https://docs.celeryproject.org/en/latest/reference/cli.html?highlight=hostname#cmdoption-celery-worker-n).

Unfortunately this refactoring dropped support for hostname patterns (`%h`, `%n`, etc.). Can we re-introduce these? All that is needed is a few `celery.utils.nodenames` calls:

```python
from celery.utils.nodenames import default_nodename, host_format

        # ...
        'hostname': host_format(default_nodename(args.celery_hostname)),
```
tests/cli/commands/test_celery_command.py
@classmethod
    def setUpClass(cls):
        cls.parser = cli_parser.get_parser()
    @mock.patch("airflow.cli.commands.celery_command.setup_locations")
    @mock.patch('airflow.cli.commands.celery_command.Process')
    @mock.patch('airflow.cli.commands.celery_command.celery_app.Worker')
    @conf_vars({("core", "executor"): "CeleryExecutor"})
    def test_worker_started_with_required_arguments(self, mock_worker, mock_popen, mock_locations):
        pid_file = "pid_file"
        mock_locations.return_value = (pid_file, None, None, None)
        concurrency = '1'