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/applications/version-management/git-and-tools/git-bz/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchgit
+{ lib, stdenv, fetchgit
 , asciidoc, docbook_xml_dtd_45, docbook_xsl, libxslt, makeWrapper, xmlto
 , pythonPackages }:
 
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
       --prefix PYTHONPATH : "$(toPythonPath "${pythonPackages.pysqlite}")"
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Bugzilla integration for git";
     longDescription = ''
       git-bz is a tool for integrating the Git command line with the