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
"""
    Gets status for many Celery tasks using the best method available
    If BaseKeyValueStoreBackend is used as result backend, the mget method is used.
    If DatabaseBackend is used as result backend, the SELECT ...WHERE task_id IN (...) query is used
    Otherwise, multiprocessing.Pool will be used. Each task status will be downloaded individually.
    """
    def __init__(self, sync_parralelism=None):
        super().__init__()
        self._sync_parallelism = sync_parralelism
    def get_many(self, async_results) -> Mapping[str, EventBufferValueType]:
        """Gets status for many Celery tasks using the best method available."""
        if isinstance(app.backend, BaseKeyValueStoreBackend):
            result = self._get_many_from_kv_backend(async_results)
            return result
        if isinstance(app.backend, DatabaseBackend):
            result = self._get_many_from_db_backend(async_results)
            return result
        result = self._get_many_using_multiprocessing(async_results)
        self.log.debug("Fetched %d states for %d task", len(result), len(async_results))
        return result
    def _get_many_from_kv_backend(self, async_tasks) -> Mapping[str, EventBufferValueType]: