[iOS] Disable the iOS nightly build until the cert issue has resolved (#45094)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/45094
Test Plan: Imported from OSS
Reviewed By: husthyc
Differential Revision: D23831152
Pulled By: xta0
fbshipit-source-id: 6327edba01e4d5abad63ac35680eefb22276423f
