Simplify local grid hardware
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As preparation for #87 (closed), I wanted to simplify the existing vagrant-related nix configuration.
The main changes are:
hardware-virtual.nix to hardware-vagrant.nix.vagrant-guest.nix in favour of the upstream one. I'm guess the one we have
was originally based on code from here,
which is where are vagrant images are built from. The differences this seems to make are:
sudoers file, most of which are duplicates, and the rest are some details of what environment variables can be passed..jq and gnumake are not on the system path.vagrant user is in group users instead of vagrant.publicIPv4 a NixOS option, rather than an argument.