ci: Change binary trigger to be nightly push (#71447)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71447
Changes the nightly build trigger to be based on pushes to the `nightly`
branch instead of being based on the tagged push. This aligns it with
our current CircleCI trigger and should make it so that it's easily
viewable using tools like https://hud.pytorch.org/ci/pytorch/pytorch/nightly
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: malfet
Differential Revision: D33647102
Pulled By: seemethere
fbshipit-source-id: c6757da35b7ec2d68bf36160dd7f3cb9ed040899
(cherry picked from commit 99b7b22650440e82fe5b150af3db53cf8c9deabd)
