Set minimum competitive score in FirstPassGroupingCollector

[gaobinlong]

Similar to TopScoreDocCollector, in FirstPassGroupingCollector, if the primary sort is _score, we can propagate the minimum competitive score to the scorer when the orderedGroups is full, this can improve the grouping performance by 20%, below are the benchmark result:

query DSL in OpenSearch:

GET big5/_search
{
  "query": {
    "match": {
      "message": "50-136-239-27"
    }
  },
  "collapse": {
    "field": "host.name"
  }
}

test result:

Before:
|                                   50th percentile service time | collapsing |     426.714 |     ms |
|                                   90th percentile service time | collapsing |     438.719 |     ms |
|                                   99th percentile service time | collapsing |     465.926 |     ms |
|                                 99.9th percentile service time | collapsing |     496.134 |     ms |
|                                  100th percentile service time | collapsing |     515.556 |     ms |

After:
|                                   50th percentile service time | collapsing |     353.501 |     ms |
|                                   90th percentile service time | collapsing |     358.511 |     ms |
|                                   99th percentile service time | collapsing |     379.314 |     ms |
|                                 99.9th percentile service time | collapsing |      398.28 |     ms |
|                                  100th percentile service time | collapsing |     476.743 |     ms |

Related to https://github.com/apache/lucene/issues/15178.