Merge branch '568377-detach-partition-code' into 'master'

Add rake task for partition mangement

See merge request !205452



Merged-by: Max Orefice <morefice@gitlab.com>
Approved-by: Max Orefice <morefice@gitlab.com>
Reviewed-by: Krasimir Angelov <kangelov@gitlab.com>
Reviewed-by: Alexandru Croitor <acroitor@gitlab.com>
Reviewed-by: Max Orefice <morefice@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>
Co-authored-by: Jon Jenkins <jjenkins@gitlab.com>