python311Packages.wxPython_4_2: use the correct mesa

The python mesa package is something else entirely.

pkgs/top-level/python-packages.nix

···
     wxGTK = pkgs.wxGTK32.override {
       withWebKit = true;
     };
+    inherit (pkgs) mesa;
   };
 
   wyoming = callPackage ../development/python-modules/wyoming { };