### 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_
x-pack/plugin/mapper-aggregate-metric/src/main/java/org/elasticsearch/xpack/aggregatemetric/mapper/AggregateDoubleMetricFieldMapper.java
}
        @Override
        public Object valueForDisplay(Object value) {
            return delegateFieldType().valueForDisplay(value);
        }
        @Override
        public DocValueFormat docValueFormat(String format, ZoneId timeZone) {
            return delegateFieldType().docValueFormat(format, timeZone);
        }
        @Override
        public Relation isFieldWithinQuery(
            IndexReader reader,
            Object from,
            Object to,
            boolean includeLower,
            boolean includeUpper,
            ZoneId timeZone,
            DateMathParser dateMathParser,
            QueryRewriteContext context
        ) throws IOException {
            return delegateFieldType().isFieldWithinQuery(reader, from, to, includeLower, includeUpper, timeZone, dateMathParser, context);
        }
        @Override
        public boolean isAggregatable() {
            return true;
        }
        @Override
        public IndexFieldData.Builder fielddataBuilder(FieldDataContext fieldDataContext) {
            return (cache, breakerService) -> new IndexAggregateDoubleMetricFieldData(
                name(),