Makes the build independency of the default.nix and update.sh file by
explicitly specifying the files that are needed in the result

This allows changing those files without causing a rebuild

This way, changing the Nix file won't change the derivation

Using nixpkgs-architecture/nix-spp@94a4f56

Tested with nix-env -qaf .

The res -> super changes are necessary because res points to the result
of the current overlay, but some of the packages were moved to the
previous overlay, which can be accessed with super. This is a
fundamental problem to be fixed, see NixOS#55061
and related issues

The schleuder change is necessary because the ./default.nix file
referenced ./., but there's also another package in ./bin. The tool
couldn't move the gemfiles in ./. because

The schleuder change is necessary because the tool isn't smart enough
and this is a special case of the default.nix reading gemfiles from a
./. reference and there being both schleuder in
pkgs/tools/security/schleuder and schleuder-cli in
pkgs/tools/security/schleuder/cli

Testing backports for moved files

PR test 2