Database for OpenBao

OpenBao stores encrypted secrets in a database. We need to determine what database we want the GitLab OpenBao instance to support. Some considerations for distribution:

• If we choose to distribute OpenBao along with the self-managed GitLab package, we have to think about how much space this will add to our existing build.
• If we choose to have customers potentially purchase and spin up a different database, this could affect the customer experience and be a detractor for using our GitLab service. (not recommended)
• We can consider creating a separate package (service + database) as an option as well.