providers/proxy: Fix duplicate cookies when using file system store.

[thijsa]

Details

#7435 and #7374 when using file system store (default when using outpost docker image).

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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)
• The translation files have been updated (make i18n-extract)

If applicable

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

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[BeryJu]

Huh I thought the redirect-loop only happens with the embedded outpost

[BeryJu]

/cherry-pick version-2023.10

[thijsa]

@BeryJu I don't use the embedded outpost but when I setup my local env I didn't get the issue using the embedded outpost. We encountered the loop on the external outpost, it sets the cookie twice, on / and on /outpost.goauthentik.io.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0e019e1) 92.59% compared to head (c79e8e9) 48.55%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7541       +/-   ##
===========================================
- Coverage   92.59%   48.55%   -44.04%     
===========================================
  Files         587      587               
  Lines       29029    29029               
===========================================
- Hits        26879    14095    -12784     
- Misses       2150    14934    +12784     

Flag	Coverage Δ
e2e	48.55% <ø> (-2.25%)	⬇️
integration	?
unit	?

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see 425 files with indirect coverage changes

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