Support for Google OIDC/Workload Identity Federation

We're all in on openTofu and prefer not to use static service account keys in our IAC jobs for GCP.

This request is support for WIF/OIDC in this component 😄
https://about.gitlab.com/blog/2023/06/28/introduction-of-oidc-modules-for-integration-between-google-cloud-and-gitlab-ci/