Combine all import with file exports information together

app/views/groups/_import_group_from_file_panel.html.haml

app/views/groups/settings/_export.html.haml

doc/administration/backup_restore/restore_gitlab.md

doc/administration/get_started.md

doc/administration/settings/import_and_export_settings.md

doc/api/bulk_imports.md

doc/api/group_import_export.md

doc/api/group_relations_export.md

doc/api/project_relations_export.md

doc/development/bulk_import.md

doc/user/gitlab_com/index.md

doc/user/group/import/index.md

doc/user/group/manage.md

doc/user/project/import/gitlab_com.md

doc/user/project/import/index.md

doc/user/project/settings/import_export.md

doc/user/project/wiki/group.md