The set of args passed to modules is useful for more than just
autoloading. This renames it appropriately and makes it available
through pkgs arguments as well.
NixOS build checks significantly slowed down `nix flake show` as it
prints out the derivation names, which for NixOS derivations requires a
large amount of evaluation. By wrapping the derivations, we now give
them trivial names. The NixOS configurations are still built when
running checks as they are a dependency of the wrappers.
This allows a configuration to be set as a function that will be passed
autoloadArgs. This is useful when each configuration is in its own file
when autoloading.
