[GCP] Add `roles/iam.roleViewer` (#21907)
[GCP] Add `roles/iam.roleViewer` (#21907)

Allows bootstrap_gcp to be called from the Head Node. This is the case with Tune's DockerSyncClient.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray