flows: better test stage's challenge responses (cherry-pick #12316)

[gcp-cherry-pick-bot]

Cherry-picked flows: better test stage's challenge responses (#12316)

Signed-off-by: Jens Langhammer jens@goauthentik.io

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[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 92.59%. Comparing base (f210625) to head (c9baae1).
Report is 2 commits behind head on version-2024.10.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
authentik/flows/stage.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##           version-2024.10   #12317      +/-   ##
===================================================
- Coverage            92.68%   92.59%   -0.10%     
===================================================
  Files                  761      761              
  Lines                37973    37979       +6     
===================================================
- Hits                 35196    35166      -30     
- Misses                2777     2813      +36     

Flag	Coverage Δ
e2e	49.15% <28.57%> (-0.16%)	⬇️
integration	24.85% <28.57%> (+<0.01%)	⬆️
unit	90.18% <71.42%> (-0.02%)	⬇️

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