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/lua-modules/default.nix

@@ -0,0 +1,17 @@
+# inspired by pkgs/development/haskell-modules/default.nix
+{ pkgs, stdenv, lib
+, lua
+, overrides ? (self: super: {})
+}:
+
+let
+
+  inherit (lib) extends makeExtensible;
+
+  initialPackages = (pkgs.callPackage ../../top-level/lua-packages.nix {
+    inherit lua;
+  });
+
+  extensible-self = makeExtensible initialPackages;
+in
+  extensible-self