Add hostAliases for webserver

[ignacionf]

The hostAliases option for webservice is added since it was only available for workers

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst)
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[potiuk]

LGTM. @jedcunningham @dstandish ?

[jedcunningham]

Can you make this change in a separate PR?

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 5 days if no further activity occurs. Thank you for your contributions.

[bdsoha]

@ignacionf Is this still relevant, something similar was already merged #27544?

[potiuk]

Yep. Closing for now - we can re-open if the author wants to change it.