Add HasSameMetadataDefinitionAs().

[ghost]

This api was approved here:

Fix https://github.com/dotnet/corefx/issues/5884

and is a necessary step to fixing the System.Dynamic.Runtime.Tests
failure:

https://github.com/dotnet/corefx/issues/19895

which is caused by Microsoft.CSharp trying to do the impossible
and emulate this api without GetMetadataToken() support.

CoreCLR implementation here:

dotnet/coreclr#11774

and CoreRT implementation in CR:

[ghost]

Cannot merge until dotnet/coreclr#11774 propagates to corefx (and preferably, corert implementation checked in.)

[ghost]

Finally, CoreCLR was updated...

[ghost]

@dotnet-bot test Linux x64 Tests - Release - Debian.87.Amd64.Open

[ghost]

@dotnet-bot test Linux x64 Tests - Release - Debian.87.Amd64.Open

[ghost]

@dotnet-bot test Linux x64 Tests - Release - Debian.87.Amd64.Open

[karelz]

@atsushikan what's the status of this PR? 11 days no update ...

[ghost]

what's the status of this PR?

What it needs it is somebody to approve it.

[ghost]

@dotnet-bot test Portable Windows x64 Release Build

[karelz]

What it needs it is somebody to approve it.

OK, are you driving that? BTW: That's why the PR is assigned to you, the (MS) author - you are expected to take action, get code reviews, chase down people, etc.

[VSadov]

LGTM
In particular since this is just exposing emplementation from dotnet/coreclr#11774 and adding tests.