[release-v1.36] add generic metrics for external API#1350

ske-prow[bot] merged 17 commits into

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

stackit-ske:cherry-pick-1228-to-release-v1.36stackit-ske/cloud-provider-stackit:cherry-pick-1228-to-release-v1.36Copy head branch name to clipboard