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/development/python-modules/python-language-server/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, pythonOlder, isPy27
+{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, pythonOlder, isPy27
 , backports_functools_lru_cache, configparser, futures, future, jedi, pluggy, python-jsonrpc-server, flake8
 , pytestCheckHook, mock, pytestcov, coverage, setuptools, ujson
 , # Allow building a limited set of providers, e.g. ["pycodestyle"].
@@ -81,7 +81,7 @@ buildPythonPackage rec {
     ++ stdenv.lib.optional isPy27 configparser
     ++ stdenv.lib.optionals (pythonOlder "3.2") [ backports_functools_lru_cache futures ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://github.com/palantir/python-language-server";
     description = "An implementation of the Language Server Protocol for Python";
     license = licenses.mit;