Lab machines need easy access to windows builds

[ProjectsByJackHe]

We need a reliable and secure way to get access to the latest window builds from various branches.

The current plan is to leverage WTT workflows, schedule run them, and save the latest build in a known location on the physical lab machines, and have our stateless lab github actions flow use those images to provision VMs and run jobs.

Alternative, we can leverage Azure Arc and use token authentication to get the latest VHDX.

This unblocks #73