Windows CI does not use latest libHSPlasma

[dpogue]

For Windows CI, we rely on vcpkg for dependencies, including libHSPlasma, which means we end up grabbing the last tagged version that was added to vcpkg rather than grabbing the latest from git.

For Linux, we clone and build libHSPlasma ourselves as part of the CI process.

My thoughts are:

1. It would be nice to be consistent and use vcpkg everywhere
2. We do probably want PlasmaShop using latest libHSPlasma
3. (as an aside from this particular issue, but in the same vein) It would be nice to have macOS CI