### Elasticsearch Version

main

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

all

### Problem Description

Do this

### Steps to Reproduce

```
rm /tmp/evil
for a in {0..9}; do
   for b in {0..9}; do
      echo '{"index": {}}' >> /tmp/evil
      echo '{"a": '$a', "b": '$b'}' >> /tmp/evil
   done
done
echo >> /tmp/evil

curl -uelastic:password -XDELETE localhost:9200/test
curl -HContent-Type:application/json -uelastic:password -XPUT localhost:9200/test
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_bulk --data-binary @/tmp/evil
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_forcemerge?max_num_segments=1
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_refresh

curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/_esql?pretty -d'{
   "query": "FROM test | STATS MAX(a) BY a, b | KEEP a"
}'
```

### Logs (if relevant)

_No response_
x-pack/plugin/esql/qa/testFixtures/src/main/java/org/elasticsearch/xpack/esql/CsvTestUtils.java
import org.elasticsearch.compute.data.Page;
import org.elasticsearch.core.Booleans;
import org.elasticsearch.core.Tuple;
import org.elasticsearch.logging.Logger;
import org.elasticsearch.xpack.esql.action.EsqlQueryResponse;
import org.elasticsearch.xpack.ql.util.StringUtils;
import org.elasticsearch.xpack.versionfield.Version;
import org.supercsv.io.CsvListReader;
import org.supercsv.prefs.CsvPreference;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import java.math.BigDecimal;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.function.Function;
import static org.elasticsearch.common.Strings.delimitedListToStringArray;
import static org.elasticsearch.common.logging.LoggerMessageFormat.format;
import static org.elasticsearch.xpack.ql.SpecReader.shouldSkipLine;
import static org.elasticsearch.xpack.ql.type.DataTypeConverter.safeToUnsignedLong;
import static org.elasticsearch.xpack.ql.util.DateUtils.UTC_DATE_TIME_FORMATTER;
import static org.elasticsearch.xpack.ql.util.NumericUtils.asLongUnsigned;
public final class CsvTestUtils {