rework luajit and lua postPatch

[lolbinarycat]

Description of changes

previously, we were completely overriding LUA_PATH_DEFAULT and LUA_CPATH_DEFAULT (even though luajit explictly says not to).

this caused several problems, such as #290721 and #293832

this PR changes simplifies how these variables are overridden, only changing PREFIX or LUA_ROOT

this will need much testing to see if it breaks anything in luaPackages

Things done

• Built on platform(s)
  • x86_64-linux (NOTE: i tested nix-build before rebasing to staging)
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

Add a 👍 reaction to pull requests you find important.

[teto]

please hold on a bit, Iam doing the same already in #286822 (comment), will push in a bit

[lolbinarycat]

@teto i was under the impression that PR took the approach of modifying LUA_PATH_DEFAULT even more, instead of just making it use the defaults.

[lolbinarycat]

if anyone is willing to run nixpkgs-review on this it would be greatly appreciated, the command is too much for my poor little laptop.

[lolbinarycat]

closing in favor of #286822