Beyond Identity: Render project information for groups in the exclusions list
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### Summary
In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151495 we added the ability to exclude Groups from the beyond identity check. We should also render project information for each group item in the list. This includes **total projects** within the group, and also the list of **projects within each group**.
| current | proposal | proposal (expanded) |
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