Builds: index literally what latest-finished queries

Dependencies

• [2] APURLT2Q Revert "Apply IndexBuildsOnJobFinishedId to unfinished builds only"
• [*] N22GPKYT * Put info about logs / build products in the DB.
• [*] C5W3WZ3Y * Index the Builds table on drvPath to prevent a full table scan
• [*] D5QIOJGP * Move everything up one directory.

Change contents

• edit in src/sql/hydra.sql at line 685
  [2.100]

  [5.0]
  + create index IndexFinishedSuccessfulBuilds on Builds(id DESC, buildstatus, finished, job, jobset_id) where buildstatus = 0 and finished = 1;
• file addition: upgrade-65.sql (----------)
  [6.3004]
  + -- Index more exactly what the latest-finished query looks for.

  + create index IndexFinishedSuccessfulBuilds

  + on Builds(id DESC, buildstatus, finished, job, jobset_id)

  + where buildstatus = 0 and finished = 1;