Add support for create search pipeline

[noCharger]

Description

Add support for create search pipeline

Issues Resolved

Part of opensearch-project/OpenSearch#7782

Testing

• New functionality includes testing

[Describe how this change was tested]

1. Unit test passed.

make test

================= 1185 passed, 5 skipped, 3 warnings in 20.11s =================

2. Added workloads and tested

    {
      "name": "create-http-log-baseline-search-pipeline",
      "operation-type": "create-search-pipeline",
      "id": "http-log-baseline-search-pipeline",
      "body": {
        "description": "Process search requests with a pipeline that does nothing. Baseline for overhead of pipeline."
      }
    }
    
    
|                                                 Min Throughput |          term |       45.65 |  ops/s |
|                                                Mean Throughput |          term |       45.65 |  ops/s |
|                                              Median Throughput |          term |       45.65 |  ops/s |
|                                                 Max Throughput |          term |       45.65 |  ops/s |
|                                       100th percentile latency |          term |     34.9443 |     ms |
|                                  100th percentile service time |          term |     12.6586 |     ms |
|                                                     error rate |          term |           0 |      % |
|                                                 Min Throughput | term_pipeline |       47.75 |  ops/s |
|                                                Mean Throughput | term_pipeline |       47.75 |  ops/s |
|                                              Median Throughput | term_pipeline |       47.75 |  ops/s |
|                                                 Max Throughput | term_pipeline |       47.75 |  ops/s |
|                                       100th percentile latency | term_pipeline |     34.4138 |     ms |
|                                  100th percentile service time | term_pipeline |     12.8929 |     ms |
|                                                     error rate | term_pipeline |           0 |      % |

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