Merge changes from topic "cherrypicker-L13500030003200477:N52900030052341505" into 24D1-dev

* changes:
  If the user only had the default db, then migrate to the new default
  Set default grid when doing a backup and restore
  Making 2 flags read only since they are used on backup and restore
  In the case the gird migration goes to a taller grid keep the grid configuration
  Revert^4 "Removing all restored backups except one so we don't have old backups"
  Add testing for GridMigration.
  Refactor migrateGridIfNeeded to pass the grid states and make it easier for unit testing