A `Xamarin.Shared.Sdk.MultiTarget.targets` file has been added to update
the ref/runtime pack versions associated with the .NET 6 SDK. This file
will ship as part of the .NET 7 SDK but only be imported when using the
.NET 6 SDK. This should work around the need to add new and net7
versioned aliases of the `Ref` and `Runtime` packs. Adding this file to
`AfterMicrosoftNETSdkTargets` will ensure that it is imported last,
after all `KnownFrameworkReferences` that need updating are declared.
Backport of #15834
Co-authored-by: Peter Collins <pecolli@microsoft.com>
Co-authored-by: Rolf Bjarne Kvinge <rolf@xamarin.com>
VS MobileTools Engineering Service 2