pytorch

06166a13 - Remove VS install step unless necessary from GHA Windows workflows (#60791)

Remove VS install step unless necessary from GHA Windows workflows (#60791) Summary: ~~This should only be merged after our AMI has been deployed after https://github.com/fairinternal/pytorch-gha-infra/pull/1. (And will likely fail our current windows jobs)~~ I have revised this PR to install VS only when it's not already installed. This should save ~5min per Windows workflow.  Pull Request resolved: https://github.com/pytorch/pytorch/pull/60791 Reviewed By: soulitzer Differential Revision: D29643876 Pulled By: janeyx99 fbshipit-source-id: 4bcfaf5bcad9e5636a1624c3e799e7cc97a87660