This will now filter the hosts in gcloud by project, instance name and
zone, to make sure we only reuse the correct hosts. Previously it would
try to reuse images outside the selected zone, resulting in a crash.
The resulting command will look like this:
$ gcloud compute instances list --project="my-project-123" --filter="name:'test-cos-beta-78-12499-16-0' AND zone:'europe-west6-b'"
d17dc136a0