chore(storage): optimize zonal system tests CloudBuild and make concurrency-safe#17171

chandra-siri merged 2 commits into

googleapis:maingoogleapis/google-cloud-python:mainfrom

chandra-siri:fix-zonal-system-tests-cloudbuildchandra-siri/google-cloud-python:fix-zonal-system-tests-cloudbuildCopy head branch name to clipboard