gitlab

Execute migrations in milestone order

See merge request !137190



Merged-by: Jon Jenkins <jjenkins@gitlab.com>
Approved-by: Michael Kozono <mkozono@gitlab.com>
Approved-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Reviewed-by: Alex Ives <aives@gitlab.com>
Reviewed-by: Michael Kozono <mkozono@gitlab.com>
Reviewed-by: Krasimir Angelov <kangelov@gitlab.com>
Co-authored-by: Krasimir Angelov <kangelov@gitlab.com>