Allow templating webserver ingress hostnames

[kimminw00]

I would like to propose allowing template values to webserver ingress hostnames.

Why is it needed?
Let's assume that we're providing airflow service to multiple teams.
By creating webserver ingress hostnames using {{ .Release.Namespace }} or {{ .Release.Name }},
there is no need to create multiple values ​​files to store different hostnames ​​for each team.

Usage

    hosts:
    #   # The hostname for the web Ingress (can be templated)
    - name: '{{ .Release.Namespace }}.airflow.service.com'

[boring-cyborg]

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[potiuk]

Sounds good - can you please add test for it?

[kimminw00]

Sounds good - can you please add test for it?

Ok, I'll add test with pytest in https://github.com/apache/airflow/blob/main/helm_tests/webserver/test_ingress_web.py

[kimminw00]

@potiuk I added test cases as requested!

[hussein-awala]

I'm a bit late! I opened #33384 to change the used function.

[potiuk]

I'm a bit late! I opened #33384 to change the used function.

And merged :)