Sync eng/common directory with azure-sdk-tools for PR 1066 (#15771)
Sync eng/common directory with azure-sdk-tools for PR 1066 (#15771)

* Update cache-control for newly created blobs

* remove extra

* remove extra space

* Added the cache control for existing blobs as well

* Update copy-docs-to-blobstorage.ps1

Co-authored-by: Sima Zhu <5fef37f6cbdb6842d05e30aec045f2f609cf3db2@microsoft.com>
Co-authored-by: Sima Zhu <d4240cdb7983fdb6beaa6416bf6a44c84cb67504@users.noreply.github.com>
jackmagic313/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,yugangw-msft/azure-sdk-for-net,yugangw-msft/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,yugangw-msft/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,markcowl/azure-sdk-for-net