treewide: clean up 'meta = with' pattern

This commit was created by a combination of scripts and tools:
- an ast-grep script to prefix things in meta with `lib.`,
- a modified nixf-diagnose / nixf combination to remove unused `with
lib;`, and
- regular nixfmt.

Co-authored-by: Wolfgang Walther <walther@technowledgy.de>

pkgs/development/interpreters/python/cpython/default.nix

@@ -845,9 +845,10 @@ stdenv.mkDerivation (finalAttrs: {
       hierarchical packages; exception-based error handling; and very
       high level dynamic data types.
     '';
-    license = licenses.psfl;
+    license = lib.licenses.psfl;
     pkgConfigModules = [ "python3" ];
-    platforms = platforms.linux ++ platforms.darwin ++ platforms.windows ++ platforms.freebsd;
+    platforms =
+      lib.platforms.linux ++ lib.platforms.darwin ++ lib.platforms.windows ++ lib.platforms.freebsd;
     mainProgram = executable;
     teams = [ lib.teams.python ];
     # static build on x86_64-darwin/aarch64-darwin breaks with: