[O# Parity] Run and debug tests in context

[dibarbet]

O# supports a couple of commands to run and debug tests using vstest console.

1. In the right click menu, run and debug tests in context
2. In codelens on test methods - links to run and debug tests

We need to add support for these commands in the preview version of the C# extension for full parity.

[agocke]

This one seems high priority -- without this feature I don't think I can run tests at all without the dev kit.

[dibarbet]

This one seems high priority -- without this feature I don't think I can run tests at all without the dev kit.

It should be one of the first features coming as soon as we finish getting the infrastructure setup in this new repo. It's a GA blocker.

[dibarbet]

Remaining TODO items:

1. Allow custom .runsettings file - https://learn.microsoft.com/en-us/visualstudio/test/configure-unit-tests-by-using-a-dot-runsettings-file?view=vs-2022
2. Support unitTestDebuggingOptions - https://github.com/dotnet/vscode-csharp/blob/main/package.json#L922

[dibarbet]

csharp.unitTestDebuggingOptions support here - #6110