[PM-36859] Add new feature flag for refactoring Org Collections Vault

[JaredScar]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-36861

📔 Objective

Adds feature flag to server

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.73%. Comparing base (f2a3555) to head (2234593).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7599      +/-   ##
==========================================
- Coverage   64.22%   59.73%   -4.50%     
==========================================
  Files        2103     2109       +6     
  Lines       92787    92752      -35     
  Branches     8266     8246      -20     
==========================================
- Hits        59591    55403    -4188     
- Misses      31139    35384    +4245     
+ Partials     2057     1965      -92     

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