v2 breaks dotnet-ef with failure to load System.Runtime v6 when it uses .NET 7's copy of it.

[AraHaan]

I have identified that my inability of using the updated dotnet-ef tool (installed locally in my project) when it tries to scaffold anything might be related it System.CommandLine trying to load v6 of System.Runtime into the default AssemblyLoadContext after the .NET 7 runtime loaded it's v7 version into the default context.

Context:

EFCore Issue for more information: dotnet/efcore#27660