lua: add withPackages function (#54460)

* lua: add withPackages function

First step towards more automation similar to the haskell backend.
Follow up of https://github.com/NixOS/nixpkgs/pull/33903

pkgs/development/interpreters/lua-5/with-packages.nix

@@ -0,0 +1,4 @@
+{ buildEnv, luaPackages }:
+
+# this is a function that returns a function that returns an environment
+f: let packages = f luaPackages; in buildEnv.override { extraLibs = packages; }