Automate some of the Gitaly HA demo setup
Part of #2527 (closed)
This MR adds a script that will:
- initialize terraform, if needed
- log in to GCP, if needed
- create the 5 VM's needed for the demo (gitlab, praefect, 3x gitaly)
- install omnibus on the 5 VM's
- print the IP's of the VM's
Edited by GitLab Release Tools Bot