A few changes:

1. Set the benchmark to run n times with -i or --iterations.
2. Set the benchmark to run only specific folders or files with -b or --benchmark.
3. Set local CSV output with -o or --output-csv.
4. Set local benchmark results to be published to a specific project with the environment variable "GCLOUD_BENCH_PUBLISH_PROJECT".
5. Set the project ID for the TPCH data read location.
6. Updated the configuration so that TPCH will run with a 10T table.
7. Updated the Kokoro GOOGLE_CLOUD_PROJECT configuration for benchmarking.

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• Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕