### Elasticsearch Version

8.10.3

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

docker

### Problem Description

Cannot sort by field if there are blank values
{
  "name": "es-1-master-2",
  "cluster_name": "es-1",
  "cluster_uuid": "kQ8-xy6FQeqjR8Zmc_a9HQ",
  "version": {
    "number": "8.10.3",
    "build_flavor": "default",
    "build_type": "docker",
    "build_hash": "c63272efed16b5a1c25f3ce500715b7fddf9a9fb",
    "build_date": "2023-10-05T10:15:55.152563867Z",
    "build_snapshot": false,
    "lucene_version": "9.7.0",
    "minimum_wire_compatibility_version": "7.17.0",
    "minimum_index_compatibility_version": "7.0.0"
  },
  "tagline": "You Know, for Search"
}

### Steps to Reproduce

Steps to recreate issue.
From kibana add sample data sets ['Sample flight data','Sample eCommerce orders']
Create dataview
name:test
index patter:kibana_*
timefield: --- I don't want to use the time filter ---

From discover sort by AvgTicketPrice, or run query
```
POST kibana_*/_search
{
    "sort": [
        {
            "AvgTicketPrice": {
                "order": "desc",
                "unmapped_type": "boolean"
            }
        }
    ],
    "fields": [
        {
            "field": "*",
            "include_unmapped": "true"
        }
    ],
    "size": 500
}
```
Can't sort on field [AvgTicketPrice]; the field has incompatible sort types: [LONG] and [FLOAT] across shards!

### Logs (if relevant)

_No response_
server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java
* merges suggestions, aggregations and profile results
     *
     * Expects sortedDocs to have top search docs across all shards, optionally followed by top suggest docs for each named
     * completion suggestion ordered by suggestion name
     */
    public static InternalSearchResponse merge(
        boolean ignoreFrom,
        ReducedQueryPhase reducedQueryPhase,
        AtomicArray<? extends SearchPhaseResult> fetchResultsArray
    ) {
        if (reducedQueryPhase.isEmptyResult) {
            return InternalSearchResponse.EMPTY_WITH_TOTAL_HITS;
        }
        ScoreDoc[] sortedDocs = reducedQueryPhase.sortedTopDocs.scoreDocs;
        var fetchResults = fetchResultsArray.asList();
        SearchHits hits = getHits(reducedQueryPhase, ignoreFrom, fetchResultsArray);
        if (reducedQueryPhase.suggest != null && fetchResults.isEmpty() == false) {
            mergeSuggest(reducedQueryPhase, fetchResultsArray, hits, sortedDocs);
        }
        return reducedQueryPhase.buildResponse(hits, fetchResults);
    }
    private static void mergeSuggest(
        ReducedQueryPhase reducedQueryPhase,
        AtomicArray<? extends SearchPhaseResult> fetchResultsArray,
        SearchHits hits,
        ScoreDoc[] sortedDocs
    ) {
        int currentOffset = hits.getHits().length;
        for (CompletionSuggestion suggestion : reducedQueryPhase.suggest.filter(CompletionSuggestion.class)) {
            final List<CompletionSuggestion.Entry.Option> suggestionOptions = suggestion.getOptions();