Service accounts: Same Org fix migration to account for duplicate entries (#84349)
* bug: fix migration to account for duplicate entries
* refactoring to create test folder for user migrations
* fix migration log
* added the migration
* additional tests
* added extSrv tests
(cherry picked from commit 6c8895e349)
Co-authored-by: Eric Leijonmarck <eric.leijonmarck@gmail.com>