Merge branch...

Merge branch '388789-improve-the-batched-background-migration-documentation-re-organize-managing-section' into 'master'

Adds "Managing" section to BBM docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/124872



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Krasimir Angelov <kangelov@gitlab.com>
Reviewed-by: Krasimir Angelov <kangelov@gitlab.com>
Co-authored-by: Leonardo Rosa <ldarosa@gitlab.com>