ci: Add a Windows native cross-arm64 job with a new image

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: <gstreamer/gstreamer!1570>
26 jobs for !1570 with add-uwp-job in 43 minutes and 23 seconds (queued for 1 second)
merge request