Ensure postgresql_new is included in GitLab CE

- Adds postgresql_new to the gitlab_rails configuration
- Ensures gitlab_exporter users newer postgres libraries
  with backwards compatibility

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8189

Changelog: fixed

Author: Dustin Collins

config/software/gitlab-exporter.rb

@@ -23,7 +23,7 @@
 
 dependency 'ruby'
 dependency 'rubygems'
-dependency 'postgresql'
+dependency 'postgresql_new'
 
 build do
   patch source: 'add-license-file.patch'

config/software/gitlab-rails.rb

@@ -48,6 +48,7 @@
 dependency 'rsync'
 dependency 'libicu'
 dependency 'postgresql'
+dependency 'postgresql_new'
 dependency 'python-docutils'
 dependency 'krb5'
 dependency 'registry'