Sync eng/common directory with azure-sdk-tools for PR 1572#843

mitchdenny merged 3 commits intomasterAzure/azure-sdk-for-ios:masterfrom

sync-eng/common-move-pipeline-generation-to-main-1572Azure/azure-sdk-for-ios:sync-eng/common-move-pipeline-generation-to-main-1572Copy head branch name to clipboard