Provision group runners with Google Cloud Platform and GitLab CI

This post details the process of provisioning a GitLab Runner on Google Cloud Platform using Terraform and the `gcloud` CLI. It outlines the steps for creating a new group runner, configuring its settings, selecting GCP as the cloud provider, and then using Terraform to provision the necessary infrastructure. The post demonstrates how to integrate this new runner into a GitLab CI/CD pipeline by providing a sample `.gitlab-ci.yml` file.