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/servers/sql/postgresql/ext/postgis.nix

@@ -1,5 +1,5 @@
 { fetchurl
-, stdenv
+, lib, stdenv
 , perl
 , libxml2
 , postgresql
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
 
   passthru.tests.postgis = nixosTests.postgis;
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Geographic Objects for PostgreSQL";
     homepage = "https://postgis.net/";
     changelog = "https://git.osgeo.org/gitea/postgis/postgis/raw/tag/${version}/NEWS";