VerifiedTrackCohortRemoval

Steps needed to remove Verified Track Cohort code:

  1. Review and merge 18974
  2. Ensure that there are CourseUserGroupPartitionGroup records for the cohorts to be migrated
  3. Generate a grade report for each course run before/after migration?
  4. Run separate data import script (creates MigrateVerifiedTrackCohortsSettings for the course runs to migrate)
  5. Notify course teams?
  6. Run manage.py lms swap_from_auto_track_cohort
  7. Remove code (PR tbd)