Update CLRMD in RemoteExecutor

This utility, used by the libraries tests, uses clrmd for creating dumps and logging info out of them when a (child) process hangs:

https://github.com/dotnet/arcade/blob/49750c02e63d0ad3a77d035bba7498a0b1acd218/src/Microsoft.DotNet.RemoteExecutor/src/RemoteInvokeHandle.cs#L178-L211

It's using Microsoft.Diagnostics.Runtime 1.0.5 - I went to update it to the latest but I see a bunch of API has changed/gone.

@leculver I see you did a lot of work for 2.0.x -- are there improvements in 2.0.x that might be worth us updating this? Note that it’s wired up to only work on Windows right now – it would be interesting to have it work on Unix.

Otherwise I’ll leave as is.

cc @stephentoub who added it