internal: remove deprecated metrics

[BeryJu]

Details

Remove deprecated metrics, add mapping to release notes

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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)

[netlify]

✅ Deploy Preview for authentik-storybook canceled.

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[netlify]

✅ Deploy Preview for authentik ready!

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🔨 Latest commit	3fc8700
🔍 Latest deploy log	https://app.netlify.com/sites/authentik/deploys/65520b174c3c9b00087e3fdb
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Lighthouse	1 paths audited Performance: 97 (no change from production) Accessibility: 90 (no change from production) Best Practices: 100 (no change from production) SEO: 80 (no change from production) PWA: - View the detailed breakdown and full score reports

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0a0f87b) 92.59% compared to head (3fc8700) 92.61%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7540      +/-   ##
==========================================
+ Coverage   92.59%   92.61%   +0.02%     
==========================================
  Files         587      587              
  Lines       28989    28989              
==========================================
+ Hits        26841    26847       +6     
+ Misses       2148     2142       -6     

Flag	Coverage Δ
e2e	50.83% <ø> (+0.01%)	⬆️
integration	25.98% <ø> (ø)
unit	89.62% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 4 files with indirect coverage changes

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