Nested virtualization needs at least an M3

https://developer.apple.com/documentation/virtualization/vzg...

This is the sad situation on my M2 MacBook Pro :(

  $ swift repl
  Welcome to Apple Swift version 6.0.2 (swiftlang-6.0.2.1.2 clang-1600.0.26.4).
  Type :help for assistance.
    1> import Virtualization
    2> VZGenericPlatformConfiguration.isNestedVirtualizationSupported
  $R0: Bool = false