Re-sign WinPV drivers with new MS process

[beshleman]

Our cross signing intermediate CA for Windows PV drivers is now expired, so we must get our drivers signed using the new Windows process for signing drivers.

The Microsoft Trusted Root Program no longer supports root certificates that have kernel mode signing capabilities

More info: https://docs.microsoft.com/en-us/windows-hardware/drivers/install/deprecation-of-software-publisher-certificates-and-commercial-release-certificates