Add support for PostgreSQL 12.X to gitlab-ctl pg-upgrade for single database nodes
The Omnibus package should install PostgreSQL 11 by default. But, running gitlab-ctl pg-upgrade
manually should upgrade the database to the bundled PostgreSQL 12.
This should work on single node installations, and installations using a separate database node with the omnibus-gitlab provided PostgreSQL. We will handle GEO and PG HA installations in separate issues.
Issue used when adding PG11: #4973 (closed)
Edited by Larissa Lane