This issue tracks things we need to migrate query to use tabledata.list instead of getQueryResults RPC.
Work is in bq-perf branch.

• Remove InternalApi QueryResponse type
• Remove InternalApi BigQuery.getQueryResults
  • Use getJob().getQueryResults instead
• Give QueryResults fewer fields (bigquery: give QueryResult fewer fields #2592)
  • To get details of a job, use Job
• Should Job.getQueryResults wait for query to finish?
• What should BigQuery.query do?
  • alias of create?
  • return completed job?
  • return iterator?
    • What option should it accept?
    • Accept option for iterating, use default option for waiting?
• Consider unified types of Job.getQueryResults and BigQuery.listTableData
• Make sure benchmark actually improves
• Make sure we don't retrogress on small queries