We have a "UAT" bucket in S3. Since our S3 logic is meaningfully different from our logic uploading directly to buildbot, we should actually use the UAT bucket in the UAT instance.
<rdar://problem/122207451>
Pull request: https://github.com/WebKit/WebKit/pull/23782
Committed 274105@main (4d11473e60a2): <https://commits.webkit.org/274105@main> Reviewed commits have been landed. Closing PR #23782 and removing active labels.