Add gpu passthrough support as well as dynamic OpenCore chainloader regeneration

[cephasara]

This PR reworks the Dockerfile into a new one just for Kubernetes. Additionally, it switches over to an Ubuntu base because OSX-KVM utilizes Ubuntu for building the OpenCore EFI loader. (I couldn't get it to work with arch) This is required, so Kubernetes can rebuild it adding kexts, changing lower-level settings, and other customizations. Also, helm/kubernetes doesn't need a lot of the configuration in the vanilla Docker version anyway.

Also, this PR introduces GPU passthrough support. This requires extensive configuration on the host--which is documented in another document (I wrote for myself, but and more than willing to share here). That being said, it is catered specifically to my setup--being ClearOS, but it SHOULD work with CentOS pretty easily as well as others. Some of the commands do vary a bit depending on OS distribution. I don't really intend on supporting other OSes, but included it for anyone else to reference.

There are many more customization options too, such as boot timeout, usb passthrough, service port forwarding, disk cache and io settings as well.

[sickcodes]

Nice so this Dockerfile is close to Docker QEMU?

[sickcodes]

This is great! It'll try give it a test today

[cephasara]

Nice so this Dockerfile is close to Docker QEMU?

Is that another repo? It could be. I based it off of your arch based one--with adaptations for Ubuntu.