### 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
Number valueForSearch(Number value) {
            return value;
        }
        /**
         * Returns true if the object is a number and has a decimal part
         */
        public static boolean hasDecimalPart(Object number) {
            if (number instanceof Byte || number instanceof Short || number instanceof Integer || number instanceof Long) {
                return false;
            }
            if (number instanceof Number) {
                double doubleValue = ((Number) number).doubleValue();
                return doubleValue % 1 != 0;
            }
            if (number instanceof BytesRef) {
                number = ((BytesRef) number).utf8ToString();
            }
            if (number instanceof String) {
                return Double.parseDouble((String) number) % 1 != 0;
            }
            return false;
        }
        /**
         * Returns -1, 0, or 1 if the value is lower than, equal to, or greater than 0
         */
        static double signum(Object value) {
            if (value instanceof Number) {
                double doubleValue = ((Number) value).doubleValue();
                return Math.signum(doubleValue);
            }