Sync shared code from runtime

[github-actions]

This PR was automatically generated to sync shared code changes from runtime. Fixes #18943

[eerhardt]

@Tratcher @JamesNK - I didn't really know what I was doing in #47650, I was just trying to unblock the runtime flow.

How do we mark this file as "shouldn't be sync'd with runtime"? Like the SR.cs file is?

[JamesNK]

SR.cs is synced. Everything in this directory is. Mirror: https://github.com/dotnet/runtime/tree/main/src/libraries/Common/src/System/Net/Http/aspnetcore

You could add the file in runtime, or move it out of this directory in aspnetcore

[eerhardt]

Can the owners of the shared code from runtime make the call here and fix it? My goal was just to get the runtime ingestion PR unblocked.

cc @ManickaP @MihaZupan @GrabYourPitchforks @dotnet/ncl

[Tratcher]

That should take care of it. I moved the copy of Obsoletions.cs into a shared folder that's not sync'd so it won't get overwritten.