### Description

For a query with params like `"params": [{"x": 1}, {"y": 2}]` running in a JVM with assertions disabled results in:

```
  "error": {
    "root_cause": [
      {
        "type": "x_content_parse_exception",
        "reason": "Failed to build [params] after last required field arrived"
      }
    ],
    "type": "x_content_parse_exception",
    "reason": "[3:19] [esql/query] failed to parse field [params]",
    "caused_by": {
      "type": "x_content_parse_exception",
      "reason": "Failed to build [params] after last required field arrived",
      "caused_by": {
        "type": "array_index_out_of_bounds_exception",
        "reason": "Index 1 out of bounds for length 0"
      }
    }
  }
```

but with assertions enabled:

```
[2023-09-07T13:03:21,434][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [runTask-0] fatal error in thread [Thread-2], exiting java.lang.AssertionError: [params] must configure at least one constructor argument. If it doesn't have any it should use ObjectParser instead of ConstructingObjectParser. This is a bug in the parser declaration.
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ConstructingObjectParser$Target.finish(ConstructingObjectParser.java:543)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ConstructingObjectParser.parse(ConstructingObjectParser.java:166)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ConstructingObjectParser.apply(ConstructingObjectParser.java:158)
┬╗      at org.elasticsearch.xpack.esql.action.EsqlQueryRequest.parseParams(EsqlQueryRequest.java:181)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.AbstractObjectParser.lambda$declareField$0(AbstractObjectParser.java:174)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.lambda$declareField$10(ObjectParser.java:431)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.parseValue(ObjectParser.java:609)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.parseArray(ObjectParser.java:604)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.parseSub(ObjectParser.java:643)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.parse(ObjectParser.java:315)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.parse(ObjectParser.java:259)
┬╗      at org.elasticsearch.xcontent@8.11.0-SNAPSHOT/org.elasticsearch.xcontent.ObjectParser.apply(ObjectParser.java:382)
┬╗      at org.elasticsearch.xpack.esql.action.EsqlQueryRequest.fromXContent(EsqlQueryRequest.java:144)
┬╗      at org.elasticsearch.xpack.esql.action.RestEsqlQueryAction.prepareRequest(RestEsqlQueryAction.java:45)
```
x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/action/EsqlQueryRequestTests.java
import java.io.IOException;
import java.time.ZoneId;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;
public class EsqlQueryRequestTests extends ESTestCase {
    public void testParseFields() throws IOException {
        String query = randomAlphaOfLengthBetween(1, 100);
        boolean columnar = randomBoolean();
        ZoneId zoneId = randomZone();
        Locale locale = randomLocale(random());
        QueryBuilder filter = randomQueryBuilder();
        List<Object> params = randomList(5, () -> randomBoolean() ? randomInt(100) : randomAlphaOfLength(10));
        StringBuilder paramsString = new StringBuilder();
        paramsString.append("[");
        boolean first = true;
        for (Object param : params) {
            if (first == false) {
                paramsString.append(", ");
            }
            first = false;
            if (param instanceof String) {
                paramsString.append("\"");
                paramsString.append(param);
                paramsString.append("\"");
            } else {
                paramsString.append(param);