Currently if create fails the shim will just be kind of stuck in limbo.
This calls shutdown to allow the shim to exit, and then invokes shim
delete.
Signed-off-by: Danny Canter <danny@dcantah.dev>
CreateSandbox states "failed to start sandbox". This is quite confusing
when you're perusing logs and trying to pinpoint how far a shim got in
its execution.
Signed-off-by: Danny Canter <danny@dcantah.dev>
