[PM-16607] - Removed feature flag logic pm-3479-secure-org-group-details

[jrmccannon]

🎟️ Tracking

PM-16607

📔 Objective

Remove obsolete feature flagged logic for Secure Organization Group Details endpoint changes. This also removes the feature flag completely since the flag was only used on the server and only affected the web client.

⏰ 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]

LaunchDarkly flag references

❌ 1 flag removed

Name	Key	Aliases found	Info
[H1] Implement new group-details endpoint	pm-3479-secure-org-group-details		✅ all references removed

[github-actions]

Checkmarx One – Scan Summary & Details – 0c95cf4b-4880-4015-8ea3-3546830e23a8

No New Or Fixed Issues Found

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 43.35%. Comparing base (1062c6d) to head (fa41970).

Files with missing lines	Patch %	Lines
...c/Api/AdminConsole/Controllers/GroupsController.cs	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5209   +/-   ##
=======================================
  Coverage   43.34%   43.35%           
=======================================
  Files        1458     1458           
  Lines       66517    66510    -7     
  Branches     6081     6079    -2     
=======================================
  Hits        28835    28835           
+ Misses      36390    36383    -7     
  Partials     1292     1292           

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