Add linux kernel configs

Copied from the Firecracker main repo:
https://github.com/firecracker-microvm/firecracker/tree/83ec483d4254936e1e2fd4adfe94761611a74a93/resources/guest_configs

This allows us to have customized kernel builds for
firecracker-containerd that are similar to upstream

Signed-off-by: Kern Walster <[email protected]>

Author: Kern--