.circleci: Re-split postnightly into its own thing (#41354)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41354
The nightly pipeline has the potential to be flaky and thus the html
pages have the potential not to be updated.
This should actually be done as an automatic lambda job that runs
whenever the S3 bucket updates but this is intermediate step in order to
get there.
Closes https://github.com/pytorch/pytorch/issues/40998
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: ezyang
Differential Revision: D22530283
Pulled By: seemethere
fbshipit-source-id: 0d80b7751ede83e6dd466690cc0a0ded68f59c5d
