nixos/parallels-guest: fix prltoolsd on NixOS for Parallels 26+ (#513034)

    services.timesyncd.enable = false;

    # Parallels Desktop 26+ mounts shared folders under /mnt/psf by default.

    # prltoolsd tries to create subdirectories there at runtime, which fails

    # if /mnt/psf does not exist. Create it declaratively via tmpfiles.

    systemd.tmpfiles.rules = [

      "d /mnt/psf 0755 root root - -"

    ];

    systemd.services.prltoolsd = {

      description = "Parallels Tools Service";

      wantedBy = [ "multi-user.target" ];

      path = [ prl-tools ];

      # prltoolsd mount scripts invoke coreutils (tail, mkdir, chmod)

      # and gnused (sed) without inheriting the service PATH in all

      # code paths. Make them available alongside prl-tools.

      path = [

        prl-tools

        pkgs.coreutils

        pkgs.gnused

      ];

      serviceConfig = {

        ExecStart = "${prl-tools}/bin/prltoolsd -f";

        PIDFile = "/var/run/prltoolsd.pid";