Praefect should not emit Gitaly errors to Sentry
Praefect has about the same Sentry integration as Gitaly has, which will check if the RPC response has an error code. If it does, it will send that to both the client, but also as an error to Sentry.
This duplicates the errors in different Sentry projects, and creates noise in the Praefect project. We should remove the errors that are Gitaly errors from Praefect by not sending them.