Use gitaly repository_service.CreateRepositoryFromBundle to restore (rake task)

What does this MR do?

Ports the repository:restore task to use gitaly instead of relying on having the repository storage on an accessible file system.

Why was this MR needed?

Closes: https://gitlab.com/charts/gitlab/issues/390 needed for restoring from omnibus backup to a cloud native installation

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

gitaly#749 (closed) https://gitlab.com/charts/gitlab/issues/390 https://gitlab.com/charts/helm.gitlab.io/issues/28

cc: @marin @twk3