Add back in Hyper-V provider

[TheCakeIsNaOH]

As of v3.0.0, the Hyper-V box was removed, so the Hyper-V provider no longer works as is.
Converting the Virtualbox image to Hyper-V is possible, but is an undocumented, potentially painful process.

Given that Virtualbox does not fully work when Hyper-V is enabled (which includes WSL 2, Windows Sandbox, and Credential/Device Guard), having a Hyper-V box would be useful and would reduce testing friction for some maintainers.

[pauby]

We've confirmed in the past that we will add a Hyper-V image but it isn't something we're working on just now.