MTP runs correctly on wasi

[Evangelink]

Partially fixes #5366. Now we need some work on the frameworks side.

Testing with TUnit as in linked ticket:

Testing with MSTest:

I haven't added some acceptance test because we need bigger machinery (workload + winget tool installed).

Simply calling dotnet run doesn't work but I don't know enough wasi to see what's missing:

[Youssef1313]

Wasi is still experimental right? Why do we care too much about it early? Regardless, I would avoid using non-cryptographic hash here. Either we disable this code path on WASI (which is telemetry only I think), or implement a managed Sha256 and use it here.

[Youssef1313]

@Evangelink I tried this but it doesn't work and I don't see any viable workaround for that on our side.

Unhandled Exception:
System.PlatformNotSupportedException: Arg_PlatformNotSupported
   at System.Threading.Tasks.Task.InternalWaitCore(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.InternalWait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at Program.<Main>(String[] args)

[Evangelink]

That's the error I was mentioning above and it's not produced by the platform afaik, so we need to fix MSTest (also TUnit as per screenshot)