sql: refactor some sql statements to lowercase

Dependencies

• [2] 6COLDXKS Create a pg_trgm index on builds.drvpath
• [3] B7ENVLRS hydra-queue-runner: Make build notification more reliable
• [*] N22GPKYT * Put info about logs / build products in the DB.

Change contents

• replacement in src/sql/hydra.sql at line 694
  [2.94]→[2.94:202](∅→∅)
  − CREATE EXTENSION pg_trgm;

  − CREATE INDEX IndexTrgmBuildsOnDrvpath ON builds USING gin (drvpath gin_trgm_ops);
  [2.94]

  [2.202]
  + create extension pg_trgm;

  + create index IndexTrgmBuildsOnDrvpath on builds using gin (drvpath gin_trgm_ops);
• replacement in src/sql/upgrade-57.sql at line 1
  [2.211]→[2.212:320](∅→∅)
  − CREATE EXTENSION pg_trgm;

  − CREATE INDEX IndexTrgmBuildsOnDrvpath ON builds USING gin (drvpath gin_trgm_ops);
  [2.211]
  + create extension pg_trgm;

  + create index IndexTrgmBuildsOnDrvpath on builds using gin (drvpath gin_trgm_ops);