Update Group Import/Export documentation
The following discussions from !20353 should be addressed: - [ ] @eread started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20353#note_285945466): > ```suggestion:-0+0 > > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20353) in GitLab 12.8 as an experimental feature. May change in future releases. > ``` > > Even better, the issue. - [ ] @eread started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20353#note_285945467): > ```suggestion:-0+2 > Group Import/Export allows for exporting group structure and importing it at a new location. > Used with [Project Import/Export](project_import_export.md), you can preserve connections with > group-level relationships. For example, connection between a project issue and group epic. > ``` - [ ] @eread started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20353#note_285945469): > ```suggestion:-0+7 > Group exports include the following: > > - Group milestones > - Group boards > - Group labels > - Group badges > - Group members > - Sub-groups. Each sub-group includes all data above > ``` - [ ] @eread started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20353#note_285945470): > ```suggestion:-0+0 > Time spent on exporting a group may vary depending on a size of the group. This endpoint > returns either: > > - The exported archive when available. > - 404 is returned otherwise. > ```
issue