[FEATURE] Add configurable iterations parameters per operation

[OVI3D0]

What solution would you like?

Similar to #120 , workloads should also have configurable iteration parameters per operation. This is would help for OSB's new Aggregate command. In the event where users customize the amount of iterations they want certain operations to run, the aggregate command should then be able to take these custom values into consideration when performing the calculation for the aggregated results.

Updating the workloads to use something like this could help:

        {
          "operation": "default",
          "warmup-iterations": {{ default_warmup_iterations or warmup_iterations | default(50) | tojson }},
          "iterations": {{ default_iterations or iterations | default(100) | tojson }},
          "target-throughput": {{ default_target_throughput or target_throughput | default(3) | tojson }},
          "clients": {{ default_clients or search_clients | default(1) }}
        }

• nyc_taxis Nyc_taxis: Add configurable iterations per operation #394
• http_logs http_logs: Add configurable iterations per operation #395
• so so: Add configurable iterations per operation #396
• geonames geonames: Add configurable iterations per operation #397
• geoshape geoshape: Add configurable iterations per operation #398
• geopoint geopoint: Add configurable iterations per operation #399
• geopointshape geopointshape: Add configurable iterations per operation #400
• eventdata eventdata: Add configurable iterations per operation #401
• pmc pmc: Add configurable iterations per operation #402
• percolator percolator: Add configurable iterations per operation #403
• noaa noaa: Add configurable iterations per operation #404
• nested nested: Add configurable iterations per operation #405

[IanHoang]

Two things left

Remaining iterations:

• Geonames:
  • Branch 7: https://github.com/opensearch-project/opensearch-benchmark-workloads/blob/7/geonames/test_procedures/default.json#L451-L504
  • Main Branch: https://github.com/opensearch-project/opensearch-benchmark-workloads/blob/main/geonames/test_procedures/default.json#L450-L472

Fix default_warmup_iterations and default_iterations

Some parameters have incorrectly named parameters. Example: https://github.com/opensearch-project/opensearch-benchmark-workloads/blob/main/http_logs/test_procedures/default.json#L832-L923

[IanHoang]

Thanks for the help @OVI3D0 !