Test against PG12 on master nightly
What does this MR do?
Add jobs to test against PG12 on master nightly schedule:
rspec migration pg12
rspec unit pg12
rspec integration pg12
rspec system pg12
rspec-ee unit pg12
rspec-ee integration pg12
rspec-ee system pg12
rspec-ee unit pg12 geo
rspec-ee integration pg12 geo
rspec-ee system pg12 geo
PG12 jobs tested in https://gitlab.com/gitlab-org/gitlab/-/pipelines/162686833
Closes #208836 (closed)
Edited by Albert Salim