There was a large change to rename a lot of our Xamarin assemblies to Microsoft
ie) Xamarin.iOS -> Microsoft.iOS
There is a mismatch with some of the prerequisites in our tools/apidiff/Makefile where dependencies
are looking for ...Microsoft.iOS... but they are still named ...Xamarin.iOS...
This PR takes any remaining "Xamarin" names and changes them to "Microsoft" for all dotnet related rules.
We will also change other dotnet rules to use the new naming convention of "macOS" and "tvOS"
The only exception is to the Xamarin.PLATFORM.dll's coming from the zip - those remain as Xamarin.iOS.dll
We should expect to see the gists showing up in ApiDiffs from this PR!
Co-authored-by: TJ Lambert <tjlambert@microsoft.com>