Extend TransferManager to support copying virtual directories within S3

[patrick-boc]

Copy all files from one virtual directory in S3 to another.

TranferManager has methods uploadDirectory() and downloadDirectory(). This request is for a similar feature but for copying dirctories within S3.

[debora-ito]

@patrick-boc Transferring this issue to SDK v1 repo.

Marking as a feature request. Please note that as the team's efforts are concentrated in SDK v2 new features, this will have low priority.

[freshmanken]

Hi is this feature being tracked somehow? It's been 2 years and didn't see any updates, thanks!