### 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
if (value instanceof BytesRef) {
                value = ((BytesRef) value).utf8ToString();
            }
            return Math.signum(Double.parseDouble(value.toString()));
        }
        /**
         * Converts an Object to a double by checking it against known types first
         */
        public static double objectToDouble(Object value) {
            double doubleValue;
            if (value instanceof Number) {
                doubleValue = ((Number) value).doubleValue();
            } else if (value instanceof BytesRef) {
                doubleValue = Double.parseDouble(((BytesRef) value).utf8ToString());
            } else {
                doubleValue = Double.parseDouble(value.toString());
            }
            return doubleValue;
        }
        /**
         * Converts an Object to a {@code long} by checking it against known
         * types and checking its range.
         */
        public static long objectToLong(Object value, boolean coerce) {
            if (value instanceof Long) {
                return (Long) value;
            }
            double doubleValue = objectToDouble(value);