.circleci: Move ecr gc build job to ecr gc workflow (#38523)
Summary:
It didn't really make sense for it to be where it was and seeing how the
build only actually takes about 5 minutes to do it'd be best to just
move it into the garbage collection workflow.
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38523
Reviewed By: malfet
Differential Revision: D21937332
Pulled By: seemethere
fbshipit-source-id: 6b797a6af88549dbd5ccce88814a1428354ce7f2
