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/tools/graphics/luxcorerender/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, boost165, pkg-config, python36
+{ lib, stdenv, fetchFromGitHub, cmake, boost165, pkg-config, python36
 , tbb, openimageio, libjpeg, libpng, zlib, libtiff, ilmbase
 , freetype, openexr, libXdmcp, libxkbcommon, epoxy, at-spi2-core
 , dbus, doxygen, qt5, c-blosc, libGLU, gnome3, dconf, gtk3, pcre
@@ -76,7 +76,7 @@ in stdenv.mkDerivation {
       --prefix GIO_EXTRA_MODULES : "${stdenv.lib.getLib dconf}/lib/gio/modules"
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Open source, physically based, unbiased rendering engine";
     homepage = "https://luxcorerender.org/";
     maintainers = with maintainers; [ hodapp ];