Google Cloud Platform Terraform module

[pascal-holy]

We should also support GCP for creating a Kubernetes cluster with Terraform by creating a wrapper module similar to our EKS module for this

[ljupcovangelski]

The module should be placed under infrastructure/terraform/modules with the name google.

After the module is done, there should be also a directory called google under infrastructure/terraform/install. This directory should later be used by the CLI when invoking the install.sh script with PROVIDER=google in install.flags.