Add arm64 support and allow toggle between docker/podman

[boyobejamin]

Add some support for MacOS Silicon.

[boyobejamin]

One issue is that it doesn't look like Kata has an arm64 variant of genpolicy

jelly@bwelch02-clarity kubecon-na24-workshop % podman run -ti ubuntu:22.04 bash
root@24cb79095689:/# apt update
.. <ommit update> ...
root@24cb79095689:/# apt install -y xz-utils curl
.. <ommit install> ...
root@24cb79095689:/# ARCH="$(dpkg --print-architecture)" && \
    curl -LO "https://github.com/kata-containers/kata-containers/releases/download/3.9.0/kata-static-3.9.0-${ARCH}.tar.xz" 
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  150M  100  150M    0     0  13.6M      0  0:00:10  0:00:10 --:--:-- 14.7M
root@24cb79095689:/# tar -xJf kata-static-3.9.0-${ARCH}.tar.xz /opt/kata/bin/genpolicy
tar: /opt/kata/bin/genpolicy: Not found in archive
tar: Exiting with failure status due to previous errors

Ls of dir

root@24cb79095689:/# tar -xJf kata-static-3.9.0-${ARCH}.tar.xz                        
root@24cb79095689:/# ls /opt/kata/bin/
cloud-hypervisor         firecracker              kata-collect-data.sh     kata-runtime             stratovirt               
containerd-shim-kata-v2  jailer                   kata-monitor             qemu-system-aarch64 

[boyobejamin]

New commits to add Kata dir to the build image and update the system path for all users. Still doesn't install genpolicy in the conatiner so use ./util/download-genpolicy.sh as is to install on MacOS. Rosetta will provide backwards compatability using the amd64 binary.

[boyobejamin]

Ready for merge