Update the jobs for the review apps to use a deploy script (taken from https://gitlab.com/gitlab-com/www-gitlab-com/-/blob/master/scripts/deploy).
The following env variables are used and set at the project settings:
The jobs also use the https://hub.docker.com/r/google/cloud-sdk Docker image, which includes the necessary tools for Google Cloud.
- Closes #735
- Blocked by https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/11021