ci: switch to ubuntu-24.04 image for testing

[BeryJu]

Details

See actions/runner-images#10636

Test our pipelines on ubuntu 24.04 to make sure everything still works when the image is rolled out.

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Checklist

• Local tests pass (ak test authentik/)
• The code has been formatted (make lint-fix)

If an API change has been made

• The API schema has been updated (make gen-build)

If changes to the frontend have been made

• The code has been formatted (make web)

If applicable

• The documentation has been updated
• The documentation has been formatted (make website)

[netlify]

✅ Deploy Preview for authentik-storybook canceled.

Name	Link
🔨 Latest commit	ad01047
🔍 Latest deploy log	https://app.netlify.com/sites/authentik-storybook/deploys/674ee195f0b8c80008058a7a

[netlify]

✅ Deploy Preview for authentik-docs canceled.

Name	Link
🔨 Latest commit	ad01047
🔍 Latest deploy log	https://app.netlify.com/sites/authentik-docs/deploys/674ee195f038e400071860bb

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.63%. Comparing base (2074944) to head (ad01047).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12253      +/-   ##
==========================================
- Coverage   92.69%   92.63%   -0.07%     
==========================================
  Files         762      762              
  Lines       38151    38151              
==========================================
- Hits        35364    35340      -24     
- Misses       2787     2811      +24     

Flag	Coverage Δ
e2e	49.04% <ø> (-0.06%)	⬇️
integration	24.76% <ø> (ø)
unit	90.22% <ø> (ø)

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