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/pg_repack.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, postgresql, openssl, zlib, readline }:
+{ lib, stdenv, fetchFromGitHub, postgresql, openssl, zlib, readline }:
 
 stdenv.mkDerivation rec {
   pname = "pg_repack";
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     install -D lib/{pg_repack--${version}.sql,pg_repack.control} -t $out/share/postgresql/extension
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Reorganize tables in PostgreSQL databases with minimal locks";
     longDescription = ''
       pg_repack is a PostgreSQL extension which lets you remove bloat from tables and indexes, and optionally restore