`org.elasticsearch.action.search.AbstractSearchAsyncAction#clusterState` is almost entirely unused, except for one trace log message and one call to `org.elasticsearch.cluster.ClusterState#getMinTransportVersion`. If the cluster state is changing quickly while searches are starting then these captured cluster states can consume substantial memory. If all we care about is the min transport version then we should just pass that in.

Note that the cluster state that ends up here is also captured by various lambdas (e.g. the one that runs after the can-match phase). The more we can reduce the scope of this cluster state capture, the better.
server/src/test/java/org/elasticsearch/action/search/SearchQueryThenFetchAsyncActionTests.java
new TotalHits(1, TotalHits.Relation.GREATER_THAN_OR_EQUAL_TO),
                                new FieldDoc[] { new FieldDoc(randomInt(1000), Float.NaN, new Object[] { shardId }) },
                                new SortField[] { sortField }
                            ),
                            Float.NaN
                        ),
                        new DocValueFormat[] { DocValueFormat.RAW }
                    );
                } else if (shardId == 1) {
                    queryResult.topDocs(
                        new TopDocsAndMaxScore(
                            new TopFieldDocs(
                                new TotalHits(1, TotalHits.Relation.GREATER_THAN_OR_EQUAL_TO),
                                new FieldDoc[] { new FieldDoc(randomInt(1000), Float.NaN, new Object[] { shardId }) },
                                new SortField[] { sortField }
                            ),
                            Float.NaN
                        ),
                        new DocValueFormat[] { DocValueFormat.RAW }
                    );
                }
                queryResult.from(0);
                queryResult.size(1);
                successfulOps.incrementAndGet();
                new Thread(() -> listener.onResponse(queryResult)).start();
            }
        };
        SearchPhaseController controller = new SearchPhaseController((t, r) -> InternalAggregationTestCase.emptyReduceContextBuilder());
        SearchTask task = new SearchTask(0, "n/a", "n/a", () -> "test", null, Collections.emptyMap());
        QueryPhaseResultConsumer resultConsumer = new QueryPhaseResultConsumer(