Remove added strictness to allow multiple query returns.

Dependencies

• [2] DKR2GXSA Update libpqxx usage to move away from deprecated API interactions.
• [3] WDGARQ76 Reuse build products / metrics stored in the database
• [4] L2IBPED2 Typo
• [5] ACBS7C6Q hydra-queue-runner: Detect changes to the scheduling shares
• [*] MHVIT4JY Split hydra-queue-runner.cc more

Change contents

• replacement in src/hydra-queue-runner/queue-monitor.cc at line 609
  [3.280]→[2.9055:9089](∅→∅)
  − auto r = txn.exec_params1
  [3.280]

  [3.315]
  + auto r = txn.exec_params
• replacement in src/hydra-queue-runner/queue-monitor.cc at line 615
  [3.618]→[2.9215:9256](∅→∅)
  − BuildID id = r[0].as<BuildID>();
  [3.618]

  [3.662]
  + BuildID id = r[0][0].as<BuildID>();
• replacement in src/hydra-queue-runner/queue-monitor.cc at line 620
  [3.762]→[2.9257:9537](∅→∅)
  − res.failed = r[1].as<int>() == bsFailedWithOutput;

  − res.releaseName = r[2].is_null() ? "" : r[2].as<std::string>();

  − res.closureSize = r[3].is_null() ? 0 : r[3].as<unsigned long long>();

  − res.size = r[4].is_null() ? 0 : r[4].as<unsigned long long>();
  [3.762]

  [3.1063]
  + res.failed = r[0][1].as<int>() == bsFailedWithOutput;

  + res.releaseName = r[0][2].is_null() ? "" : r[0][2].as<std::string>();

  + res.closureSize = r[0][3].is_null() ? 0 : r[0][3].as<unsigned long long>();

  + res.size = r[0][4].is_null() ? 0 : r[0][4].as<unsigned long long>();