Fix broken CI related to postgres image
Problem
As of the last hour or so, we are seeing errors like the following in CI:
PG::ConnectionBad: could not translate host name "postgres" to address: Name or service not known?Example: https://gitlab.com/gitlab-org/customers-gitlab-com/pipelines/118021482
Proposal
The underlying problem and fix has already been applied for gitlab with gitlab!25274 (merged). A similar fix would probably solve it for customers.gitlab.com.
Result
A functional CI.