Allow gitlab backup restore to restore one repo or a group of repos
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Currently you can create a backup by type and restore that:
- `db` (database)
- `uploads` (attachments)
- `repositories` (Git repositories data)
- `builds` (CI job output logs)
- `artifacts` (CI job artifacts)
- `lfs` (LFS objects)
- `registry` (Container Registry images)
- `pages` (Pages content)
but there is no way to restore a specific repo from a backup. Seems like it might be a good feature to allow restoring on a repo or group basis. This was brought up in a customer call.
ZD: https://gitlab.zendesk.com/agent/tickets/69248
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