Remove ciflow_should_run job (#70204)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/66725
This removes the ci_flow_should_run job and puts it in the build stage for the different job templates.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70204
Reviewed By: malfet
Differential Revision: D33282338
Pulled By: zengk95
fbshipit-source-id: 327ff2bca9720d2a69083594ada5c7788b65adbd
