[PM-17715] Remove feature flag check from New Device Verification opt-out

[trmartin4]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-17715

📔 Objective

In #12880 we added the ability for users to opt out of New Device Verification.

In the original PR, the functionality was gated behind the new-device-verification feature flag.

This PR removes this feature from the larger feature flag scope, so that we can allow users to opt out prior to the feature being introduced.

See bitwarden/server#5342 for corresponding server PR.

📸 Screenshots

Screen.Recording.2025-01-29.at.12.41.22.PM.mov

⏰ 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 – 88fc296c-5924-496b-aa0d-32c50f11d4e2

Great job, no security vulnerabilities found in this Pull Request

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.37%. Comparing base (1a97e86) to head (2f6d209).
Report is 89 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13130   +/-   ##
=======================================
  Coverage   35.37%   35.37%           
=======================================
  Files        3010     3010           
  Lines       91176    91174    -2     
  Branches    16996    16996           
=======================================
  Hits        32251    32251           
+ Misses      56419    56417    -2     
  Partials     2506     2506           

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[Patrick-Pimentel-Bitwarden]

👍 Changes look good.