Fix GCP resource labels for mixed-case owner#6737

kiryl-filatau wants to merge 3 commits into

GoogleCloudPlatform:masterGoogleCloudPlatform/PerfKitBenchmarker:masterfrom

kiryl-filatau:gcp-tags-lower-fixkiryl-filatau/PerfKitBenchmarker:gcp-tags-lower-fixCopy head branch name to clipboard