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

[trmartin4]

🎟️ Tracking

bitwarden.atlassian.net/browse/PM-17715

📔 Objective

In #5264 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. However, we want to let users enable this feature prior to the larger feature being released.

This PR removes the feature flag gate from the endpoint required to opt out of new device verification.

See bitwarden/clients#13130 for corresponding clients PR.

📸 Screenshots

⏰ 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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.32%. Comparing base (a5b3f80) to head (f6f79ad).
Report is 40 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5342   +/-   ##
=======================================
  Coverage   44.32%   44.32%           
=======================================
  Files        1483     1483           
  Lines       68418    68418           
  Branches     6173     6173           
=======================================
  Hits        30325    30325           
  Misses      36784    36784           
  Partials     1309     1309           

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[Patrick-Pimentel-Bitwarden]

👍 Read the pr and description, sounds good.

[github-actions]

Checkmarx One – Scan Summary & Details – 98f1c87f-9468-4eb7-ab38-ffb7b86c1b89

Great job, no security vulnerabilities found in this Pull Request