Update aggregate handling

Dependencies

• [2] JCJJKRWQ Handle job aliases in AggregateConstituents
• [3] FTPCV25M Store aggregate members in the database
• [4] JTHWA6AM Rename aggregate members to constituents
• [*] N22GPKYT * Put info about logs / build products in the DB.

Change contents

• replacement in src/script/hydra-eval-jobset at line 700
  [2.1021]→[3.2817:2889](∅→∅),[3.5280]→[3.2817:2889](∅→∅)
  − foreach my $drvPath (split / /, $job->{constituents}) {
  [2.1021]

  [3.2889]
  + foreach my $drvPath (@{$job->{constituents}}) {