Update the hydra-queue-runner unit

Dependencies

• [2] 7XOH2DGH hydra-module.nix: Give types to options
• [3] ZYEFL36Q Ported/merged properties from the TUD configuration's hydra-module
• [4] L62I7CPI Don't put ssmtp in hydra's paths
• [5] KMPLMG7T hydra-module.nix: Cleanup
• [*] D3MDJONY

Change contents

• replacement in hydra-module.nix at line 235
  [3.1684]→[2.924:1086](∅→∅)
  − { ExecStartPre = "${cfg.package}/bin/hydra-queue-runner --unlock";

  − ExecStart = "@${cfg.package}/bin/hydra-queue-runner hydra-queue-runner";
  [3.1684]

  [3.359]
  + { ExecStart = "@${cfg.package}/bin/hydra-queue-runner hydra-queue-runner";

  + ExecStopPost = "${cfg.package}/bin/hydra-queue-runner --unlock";