Move Geo migrations and schema to CE
In https://gitlab.com/gitlab-org/gitlab-ee/issues/9686 we discuss moving the EE schema to CE, which is done in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/26940. This MR does not take care of Geo at the moment.
For Geo we probably only need to move the migrations into CE, but I'm not too familiar with the migration setup for Geo. As a result I think it would be best if the Geo team could look into this.