devstack-vm.pkr.hcl based off https://github.com/tylert/packer-build/blob/ae7023158a026ab6d86b82579902987a98a578d6/source/debian/11_bullseye/base.pkr.hcl
base.preseed based off https://github.com/tylert/packer-build/blob/ae7023158a026ab6d86b82579902987a98a578d6/source/debian/11_bullseye/base.preseed