hydra-module.nix: Take lib from the module system, not from pkgs

Dependencies

• [2] D3MDJONY
• [3] KMPLMG7T hydra-module.nix: Cleanup

Change contents

• replacement in hydra-module.nix at line 1
  [2.1]→[2.2:25](∅→∅)
  − { config, pkgs, ... }:
  [2.1]

  [2.25]
  + { config, pkgs, lib ? pkgs.lib, ... }:
• replacement in hydra-module.nix at line 3
  [2.26]→[2.26:41](∅→∅)
  − with pkgs.lib;
  [2.26]

  [2.41]
  + with lib;