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)),
```
airflow/executors/celery_executor.py
#
#
#
"""CeleryExecutor
.. seealso::
    For more information on how the CeleryExecutor works, take a look at the guide:
    :ref:`executor:CeleryExecutor`
"""
import datetime
import logging
import math
import operator
import os
import subprocess
import time
import traceback
from collections import OrderedDict
from multiprocessing import Pool, cpu_count
from typing import Any, Dict, List, Mapping, MutableMapping, Optional, Set, Tuple, Union
from celery import Celery, Task, states as celery_states
from celery.backends.base import BaseKeyValueStoreBackend
from celery.backends.database import DatabaseBackend, Task as TaskDb, session_cleanup
from celery.result import AsyncResult