Add progress listener when starting upload to s3

[ChrisBlom]

instead of attaching it to the upload after it has started which may cause the listener to miss events, especially for small uploads

[lbradstreet]

@ChrisBlom Thanks. I did actually try that but I was a little scared by the "internal" in the S3ListenerProgress name.

You're right that successful uploads may not be removed from the tracked uploads, so I think it's worth the risk in this case. Thanks for the PR.