Fix Test_Windows_CoreClr_Debug_Single_Machine job

[RikkiGibson]

After #59903 was merged, all runs of 'Test_Windows_CoreClr_Debug_Single_Machine' started failing. We missed this since it only runs in rolling builds.

Example run

Also failing in #60207

1. Let's fix the issue causing the job to fail.
2. Let's introduce some method of reporting so that we know when breaks like this have been checked in.

[JoeRobich]

roslyn/eng/Versions.props

Lines 200 to 205 in bddc362

	<!--
	The package "Microsoft.CodeAnalysis.Analyzer.Testing" brings in an earlier version of these NuGet dependencies than
	is expected by the NET SDK used in the Workspace.MSBuild UnitTests. In order to test against the same verion of NuGet
	as our configured SDK, we must set the version to be the same.
	-->
	<NuGetCommonVersion>6.1.0</NuGetCommonVersion>

[JoeRobich]

Updated the message fabric bot places on Arcade updates that change the pinned dotnet SDK version. It now includes a task list of things to update, including the NuGet version.

[JoeRobich]

Let's introduce some method of reporting so that we know when breaks like this have been checked in.

I would love to know when two consecutive rolling builds of main have CI failures.