notifications.t: use system() with lists

Dependencies

• [2] 3DNFPPSL notifications.t: move to makeAndEvaluateJobset
• [3] HWGFAF2B queue runner: test notifications

Change contents

• replacement in t/queue-runner/notifications.t at line 40
  [2.104]→[2.104:262](∅→∅),[2.262]→[3.1834:1963](∅→∅),[3.1834]→[3.1834:1963](∅→∅)
  − is(system("nix-build '" . $ctx->jobsdir . "/notifications.nix' -A canbesubstituted --out-link '${outlink}'"), 0, "Building notifications.nix succeeded");

  − is(system("nix copy --to 'file://${binarycachedir}' '${outlink}'"), 0, "Copying the closure to the binary cache succeeded");
  [2.104]

  [3.1963]
  + is(system('nix-build', $ctx->jobsdir . '/notifications.nix', '-A', 'canbesubstituted', '--out-link', $outlink), 0, "Building notifications.nix succeeded");

  + is(system('nix', 'copy', '--to', "file://${binarycachedir}", $outlink), 0, "Copying the closure to the binary cache succeeded");
• replacement in t/queue-runner/notifications.t at line 46
  [3.2128]→[3.2128:2309](∅→∅)
  − is(system("nix log '$outpath'"), 0, "Reading the output's log succeeds");

  − is(system("nix-store --delete '$outpath'"), 0, "Deleting the notifications.nix output succeeded");
  [3.2128]

  [3.2309]
  + is(system('nix', 'log', $outpath), 0, "Reading the output's log succeeds");

  + is(system('nix-store', '--delete', $outpath), 0, "Deleting the notifications.nix output succeeded");
• replacement in t/queue-runner/notifications.t at line 54
  [2.325]→[2.325:496](∅→∅)
  − is(system("nix-build '" . $ctx->jobsdir . "/notifications.nix' -A canbesubstituted --max-jobs 0 --out-link '${outlink}'"), 0, "Building notifications.nix succeeded");
  [2.325]

  [3.2756]
  + is(system('nix-build', $ctx->jobsdir . '/notifications.nix', '-A', 'canbesubstituted', '--max-jobs', '0', '--out-link', $outlink), 0, "Building notifications.nix succeeded");
• replacement in t/queue-runner/notifications.t at line 58
  [3.2870]→[3.2870:2955](∅→∅)
  − isnt(system("nix log '$outpath'"), 0, "Reading the deleted output's log fails");
  [3.2870]

  [3.2955]
  + isnt(system('nix', 'log', $outpath), 0, "Reading the deleted output's log fails");
• replacement in t/queue-runner/notifications.t at line 63
  [3.3127]→[3.3127:3218](∅→∅)
  − is(system("nix-store --delete '$outpath'"), 0, "Deleting the basic output succeeded");
  [3.3127]

  [3.3218]
  + is(system('nix-store', '--delete', $outpath), 0, "Deleting the notifications.nix output succeeded");