Geo: Add states and registry table to add SSF support for designs

What does this MR do and why?

This MR adds two new tables to support Geo replication and verification of Design repositories through the self-service framework.

This MR follows the documented instructions for adding datatypes to the SSF here #355660 (closed)

The rest of the related work is in the MR https://gitlab.com/gitlab-org/gitlab/-/merge_requests/11395.

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