There has been various issues with vfkit exiting with
"Error: vfkit exited unexpectedly with exit code 1"
Among other reasons, this can be caused by vfkit being
built without the com.apple.security.virtualization
entitlement, and this can also happen when running
vfkit.x86_64 on Apple silicon hardware.
At the moment, the vfkit logs are not available, so there is no easy way
to know what's happening. This PR redirects vfkit stdout/stderr to
podman's log when --log-level debug is used.
Signed-off-by: Christophe Fergeau <cfergeau@redhat.com>