Enable kubernetes_node_scale benchmark (up to 5k nodes) on GCP GKE with CCC#6536

vofish wants to merge 2 commits intoGoogleCloudPlatform:masterGoogleCloudPlatform/PerfKitBenchmarker:masterfrom

kiryl-filatau:gcp-5k-ccckiryl-filatau/PerfKitBenchmarker:gcp-5k-cccCopy head branch name to clipboard