Sync eng/common directory with azure-sdk-tools for PR 1577#2169

benbp merged 4 commits intomasterAzure/azure-sdk-for-cpp:masterfrom

sync-eng/common-benbp/sparse-checkout-path-improvement-1577Azure/azure-sdk-for-cpp:sync-eng/common-benbp/sparse-checkout-path-improvement-1577Copy head branch name to clipboard