[PM-31622] Adds feature flag pm-30521-autofill-button-view-login-screen

[jengstrom-bw]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-31622

📔 Objective

Add feature flag pm-30521-autofill-button-view-login-screen

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – a03ce41a-83eb-4d55-8524-bfb77c6eb0bd

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.13%. Comparing base (d4de03a) to head (f870165).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6943      +/-   ##
==========================================
- Coverage   60.01%   56.13%   -3.88%     
==========================================
  Files        1971     1974       +3     
  Lines       87091    87195     +104     
  Branches     7759     7762       +3     
==========================================
- Hits        52266    48949    -3317     
- Misses      32929    36434    +3505     
+ Partials     1896     1812      -84     

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[nikwithak]