### Elasticsearch Version

main

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

all

### Problem Description

When you configure an `aggregate_metric_double` with `ignore_malformed: true` and send a malformed value we create an `_ignored` field with three values, `field.value_count`, `field.min`, and `field.max`. This is the only top "composite" field that creates `_ignored` values for its children. Things like shape only create `field` in `_ignored`. Is there a good reason for `aggregate_metric_double` to be different?

### Steps to Reproduce

see above

### Logs (if relevant)

_No response_
server/src/main/java/org/elasticsearch/index/mapper/NumberFieldMapper.java
public double reduceToStoredPrecision(double value) {
            return ((Number) value).doubleValue();
        }
        abstract SourceLoader.SyntheticFieldLoader syntheticFieldLoader(String fieldName, String fieldSimpleName, boolean ignoreMalformed);
        private static SourceLoader.SyntheticFieldLoader syntheticLongFieldLoader(
            String fieldName,
            String fieldSimpleName,
            boolean ignoreMalformed
        ) {
            return new SortedNumericDocValuesSyntheticFieldLoader(fieldName, fieldSimpleName, ignoreMalformed) {
                @Override
                protected void writeValue(XContentBuilder b, long value) throws IOException {
                    b.value(value);
                }
            };
        }
    }
    public static class NumberFieldType extends SimpleMappedFieldType {
        private final NumberType type;
        private final boolean coerce;
        private final Number nullValue;
        private final FieldValues<Number> scriptValues;
        private final boolean isDimension;
        private final MetricType metricType;
        public NumberFieldType(
            String name,
            NumberType type,
            boolean isIndexed,
            boolean isStored,
            boolean hasDocValues,