Needed an update to the windows Dockerfile to:
1. Install the 'UniversalBuildTools' workload for Cerbero
2. Install ARM and ARM64 workloads for cross-uwp-universal in Cerbero
3. Install VS 2019 since we need that for ARM64 NEON support in Opus
We can't test UWP in gstreamer.git because glib needs custom patches
for that. It will be tested in Cerbero.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1570>
