sources/saml: Add audience override to admin form

[PeshekDotDev]

Details

What does this PR change?

Why is this change needed?

How was this tested?

Linked issues

Closes #25037

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Checklist

• The project has been linted, built, and tested (make all)
• The documentation has been updated and formatted (make docs)
• I have read the AI usage policy.

[netlify]

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✅ Deploy Preview for authentik-docs ready!

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.64%. Comparing base (9bd8fab) to head (dfa090f).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #25537      +/-   ##
==========================================
- Coverage   91.67%   91.64%   -0.03%     
==========================================
  Files        1151     1151              
  Lines       73416    73416              
  Branches     4054     4054              
==========================================
- Hits        67302    67281      -21     
- Misses       6072     6093      +21     
  Partials       42       42              

Flag	Coverage Δ
conformance	34.41% <ø> (ø)
e2e	39.07% <ø> (-0.01%)	⬇️
integration	30.97% <ø> (-0.04%)	⬇️
rust	42.92% <ø> (ø)
unit	93.22% <ø> (+<0.01%)	⬆️
unit-migrate	93.24% <ø> (+<0.01%)	⬆️

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[github-actions]

authentik PR Installation instructions

Instructions for docker-compose

Add the following block to your .env file:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-dfa090fac59df33783aeefc9cada757e1ca7fa71
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

Afterwards, run the upgrade commands from the latest release notes.

Instructions for Kubernetes

Add the following block to your values.yml file:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
global:
    image:
        repository: ghcr.io/goauthentik/dev-server
        tag: gh-dfa090fac59df33783aeefc9cada757e1ca7fa71

Afterwards, run the upgrade commands from the latest release notes.