images: use k8s-staging-test-infra/gcb-docker-gcloud#104

k8s-ci-robot merged 1 commit intokubernetes-sigs:masterkubernetes-sigs/boskos:masterfrom

spiffxp:use-k8s-infra-for-cloudbuildspiffxp/boskos:use-k8s-infra-for-cloudbuildCopy head branch name to clipboard