GitLab-Google Cloud integrations now in public beta

What this post added

This post introduces the public beta of GitLab-Google Cloud integrations. Key technical contributions include: 1. Streamlined authentication using IAM and Workload Identity Federation, replacing service account keys. 2. Introduction of an `identity` keyword in CI/CD YAML for developer-minded authentication. 3. Runner configuration automation for Google Cloud, making hosted runners available without leaving GitLab. 4. A library of Google Cloud Services components in GitLab's CI/CD Catalog for easier deployment to GKE, Artifact Registry, and Cloud Deploy.