Reduce duplication in pkg generation by using arcade logic

[sfoslund]

#11813 (comment)
We should be able to replace some of the pkg generation logic in this repo with arcade's logic here: https://github.com/dotnet/arcade/tree/main/src/Microsoft.DotNet.Build.Tasks.Installers

[marcpopMSFT]

Old issue triage: This seems still potentially valuable to look into and also potentially make available in the SDK for external projects so keeping the issue around.

[marcpopMSFT]

https://github.com/dotnet/arcade/tree/main/src/Microsoft.DotNet.Build.Tasks.Installers