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/security/gau/default.nix

@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, stdenv
+, lib, stdenv
 }:
 
 buildGoModule rec {
@@ -16,7 +16,7 @@ buildGoModule rec {
 
   vendorSha256 = "17ag2wvaxv2dyx3yx3fvlf36ww4a44660pn4gvpbrwacsan9as5s";
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Tool to fetch known URLs";
     longDescription = ''
       getallurls (gau) fetches known URLs from various sources for any