Enables migrations of all user-based repoRef prefixes away from the user's PrincipalName and onto the user's ID for a more stable reference. --- #### Does this PR need a docs update or release note? - [x] ✅ Yes, it's included #### Type of change - [x] 🌻 Feature #### Issue(s) * #2825 #### Test Plan - [x] 💪 Manual - [x] ⚡ Unit test - [x] 💚 E2E