This commit implements a matrix test job to run multiple
Terraform integration tests in parallel. It also implements
a cleanup script to ensure that failed test runs do not leave
infrastructure deployed which would cost money!

Switch to use terraform-module.yml. This provides the same functionality as the original script, namely to lint the Terraform with the addition of creating a Terraform Module if a commit tag is provided

This module manages a Cloud Run-hosted container. It takes care of making
sure the container is connected to a Cloud SQL instance and sets
environment variables on the application.