[release-v1.36] clean up old stackit client#1334

ske-prow[bot] merged 4 commits into

stackitcloud:release-v1.36stackitcloud/cloud-provider-stackit:release-v1.36from

stackit-ske:cherry-pick-1320-to-release-v1.36stackit-ske/cloud-provider-stackit:cherry-pick-1320-to-release-v1.36Copy head branch name to clipboard