remove records with grouping

[ansjcy]

Description

Remove records with grouping enabled

Testing

• enable top queries with group by similarity
• send the same search queries and check UI, there's no rows.
• Check API response, the query groups are returned correctly

➜  ~ curl -X GET "localhost:9200/_insights/top_queries?pretty"
{
  "top_queries" : [
    {
      "timestamp" : 1730939434086,
      "task_resource_usages" : [
        {
          "action" : "indices:data/read/search[phase/query]",
          "taskId" : 336,
          "parentTaskId" : 335,
          "nodeId" : "GMGKkdcNTzCi2f_ZTanWQg",
          "taskResourceUsage" : {
            "cpu_time_in_nanos" : 3696000,
            "memory_in_bytes" : 34544
          }
        },
        {
          "action" : "indices:data/read/search",
          "taskId" : 335,
          "parentTaskId" : -1,
          "nodeId" : "GMGKkdcNTzCi2f_ZTanWQg",
          "taskResourceUsage" : {
            "cpu_time_in_nanos" : 259000,
            "memory_in_bytes" : 3720
          }
        }
      ],
      "labels" : { },
      "source" : {
        "size" : 20,
        "query" : {
          "term" : {
            "user.id" : {
              "value" : "cyji",
              "boost" : 1.0
            }
          }
        }
      },
      "total_shards" : 1,
      "phase_latency_map" : {
        "expand" : 0,
        "query" : 7,
        "fetch" : 0
      },
      "indices" : [
        "my-index-0"
      ],
      "search_type" : "query_then_fetch",
      "node_id" : "GMGKkdcNTzCi2f_ZTanWQg",
      "query_hashcode" : "5b736559acb94cbe940c73e4fe19245",
      "measurements" : {
        "memory" : {
          "number" : 76528,
          "count" : 2,
          "aggregationType" : "AVERAGE"
        },
        "cpu" : {
          "number" : 4701000,
          "count" : 2,
          "aggregationType" : "AVERAGE"
        },
        "latency" : {
          "number" : 10,
          "count" : 2,
          "aggregationType" : "AVERAGE"
        }
      }
    }
  ]
}

• disable grouping

  {
  "persistent" : {
  "search.insights.top_queries.group_by" : "none"
  }
  }

• send the same search queries multiple times
• check UI, queries are displayed

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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[ansjcy]

Note: there will be conflicts with https://github.com/opensearch-project/query-insights-dashboards/pull/21/files