GeezerVison

PR Summary

Add the needed variable groups to the MSIX VPack pipeline to enforce using the production ADO feed.

The MSIX VPack pipeline is using the public ADO feed without PAT for building PowerShell. This works fine before because all needed packages are already pulled to the ADO feed from the upstream by the Coordinate Binary build, so later when running MSIX VPack pipeline, there is no need to pull a NuGet package from upstream, and accessing available NuGet packages in that feed doesn't require authentication.

But with the early-access .NET feed work, e.g. in PowerShell v7.6.5, the Coordinate Binary build uses a different internal feed for build and thus when it gets to the MSIX VPack pipeline, it requires the needed packages to be pulled from upstream to the ADO feed, which requires authentication, and thus the build failed.

This change will make sure the 'Switch to production Azure DevOps feed for all nuget.configs' step gets run from the insert-nuget-config-azfeed.yml template, to give the pipeline the permission to pull packages from upstream.