Extend checkout for pytorch/builder (#70644)
Summary:
https://www.torch-ci.com/minihud shows 2 recent failures due to timing out. Increasing to 30m to see if it could be alleviated.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70644
Reviewed By: suo, malfet, seemethere, atalman
Differential Revision: D33413604
Pulled By: janeyx99
fbshipit-source-id: 756a7ad94c589e39b8567acbfc3e769dc0b9113f
