Update a list of included parameters for Group Import/Export to use AttributesPermitter & allow-list approach
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=356507) </details> <!--IssueSummary end--> Similar to what has been done for Project Import/Export https://gitlab.com/gitlab-org/gitlab/-/issues/341272 we need to update Group Import/Export to use [`Gitlab::ImportExport::AttributesPermitter`](http://gitlab.com/gitlab-org/gitlab/blob/8b37e5107af85fc234ab8644bc98587b1cd94ef3/lib/gitlab/import_export/attributes_permitter.rb#L42-L42) and allow-list approach to enhance its security. Extend `lib/gitlab/import_export/group/import_export.yml` with new section that contains attributes that should be included for import, similar to `lib/gitlab/import_export/group/import_export.yml`: ``` included_attributes: group: ... ```
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