Bump nightlies to 1.7.0 (#40519)
Summary:
edit: apparently we hardcode a lot more versions that I would've anticipated.
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40519
Differential Revision: D22221280
Pulled By: seemethere
fbshipit-source-id: ba15a910a6755ec08c10f7783ed72b1e06e6b570
