### 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
checkNoTimeZone(timeZone);
            if (format == null) {
                return DocValueFormat.RAW;
            }
            return new DocValueFormat.Decimal(format);
        }
        public Number parsePoint(byte[] value) {
            return type.parsePoint(value);
        }
        @Override
        public CollapseType collapseType() {
            return CollapseType.NUMERIC;
        }
        /**
         * @return true if field has been marked as a dimension field
         */
        public boolean isDimension() {
            return isDimension;
        }
        /**
         * If field is a time series metric field, returns its metric type
         * @return the metric type or null
         */
        public MetricType getMetricType() {
            return metricType;
        }
    }
    private final NumberType type;
    private final boolean indexed;
    private final boolean hasDocValues;