Fix upload issue with linux libtorch nightlies (#23368)
Summary:
This is a small fix on top of gh-23348, which fixed the libtorch
nightly build timeouts.
For the latest nighly build (25 July), see
https://circleci.com/workflow-run/33d0a24a-b77c-4a8f-9ecd-5646146ce684
The only failures are these uploads, which is because `aws s3 cp`
can only deal with one file at a time. The only way to make it do
multiple files at once is:
```
aws s3 cp . "$s3_dir" --exclude "*" --include "libtorch-*.zip" --recursive --acl public-read
```
which is much more verbose. executing one `cp` per file should be fine,
and this is also what's done in `binary_macos_upload.sh`
Closes gh-23039
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23368
Differential Revision: D16488853
Pulled By: soumith
fbshipit-source-id: 6dc04b4de2f6cd2de5ae9ad57a6e980f56896498
