podman.msi GUI has a radio-button to select WSL or Hyper-V
The checkbox in podman.msi GUI allow the user to specify if
the machine provider installation (WSL or Hyper-V) should
be part of podman installation or not.
podman-setup.exe supports 2 new variables: MachineProvider
(valid values are `wsl` and `hyperv`) and HyperVCheckbox
(valid values are `0` and `1`)
Installation creates the configuration file
`99-podman-machine-provider.conf` under folder
`%APPDATA\containers\containers.conf.d` with the selected
machine provider
Cirrus CI `win_installer_task` tests the installation with
both `hyperv` and `wsl` and verifies the configuration.
Uninstallation is tested too.
Note that podman-setup.exe GUI doesn't allow to choose the
provider yet. See https://github.com/containers/podman/issues/22492
Signed-off-by: Mario Loriedo <mario.loriedo@gmail.com>