treewide: with stdenv.lib; in meta -> with lib;

Part of: https://github.com/NixOS/nixpkgs/issues/108938

meta = with stdenv.lib;

is a widely used pattern. We want to slowly remove
the `stdenv.lib` indirection and encourage people
to use `lib` directly. Thus let’s start with the meta
field.

This used a rewriting script to mostly automatically
replace all occurances of this pattern, and add the
`lib` argument to the package header if it doesn’t
exist yet.

The script in its current form is available at
https://cs.tvl.fyi/depot@2f807d7f141068d2d60676a89213eaa5353ca6e0/-/blob/users/Profpatsch/nixpkgs-rewriter/default.nix

pkgs/desktops/gnome-2/bindings/gnome-python-desktop/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gnome_python, librsvg, libwnck, libgtop, pkgconfig, python2, gtk2 }:
+{ lib, stdenv, fetchurl, gnome_python, librsvg, libwnck, libgtop, pkgconfig, python2, gtk2 }:
 
 let
   inherit (python2.pkgs) python pygtk;
@@ -23,7 +23,7 @@ in stdenv.mkDerivation rec {
     echo "gtk-2.0" > $out/${python2.sitePackages}/${pname}-${version}.pth
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "http://www.pygtk.org";
     description = "Python bindings for GNOME desktop packages";
     license = licenses.lgpl21;