Update and refactor UT2004

[abbradar]

Motivation for this change

Update the game to the latest demo version and allow to use full game resources if available.

Things done

• Tested using sandboxing
  (nix.useSandbox on NixOS,
  or option build-use-sandbox in nix.conf
  on non-NixOS)
• Built on platform(s)
  • NixOS
  • OS X
  • Linux
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

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With this one can build ut2004Packages.ut2004 [ fullGame latestPatch ] and play the full game. I have expressions for both the full game (for GOG version) and the latest patch but as per #10981 we don't want to include packages that require paid data files. I think of publishing them in a separate repo later along with several other packages like this.

Merging in several days unless someone spots a problem.

[mention-bot]

@abbradar, thanks for your PR! By analyzing the annotation information on this pull request, we identified @edolstra, @vcunat and @robberer to be potential reviewers

[abbradar]

For those interested, I have a small repository with several games that don't belong to nixpkgs: https://github.com/abbradar/nixpkgs-nonfree. For now I only have ut2004 and nwn here.