pythonPackages.buildPython*: also output dist when using wheel

Typically the actual wheel will be unchanged, but it is possible we use
the relax deps hook modifying the wheel.

pkgs/development/interpreters/python/mk-python-derivation.nix

···
 let
   inherit (python) stdenv;
 
-  withDistOutput = lib.elem format ["pyproject" "setuptools" "flit"];
+  withDistOutput = lib.elem format ["pyproject" "setuptools" "flit" "wheel"];
 
   name_ = name;