### 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
/**
             * Parse a query parameter or {@code _source} value to a float,
             * keeping float precision. Used by queries which need more
             * precise control over their rounding behavior that
             * {@link #parse(Object, boolean)} provides.
             */
            private static float parseToFloat(Object value) {
                final float result;
                if (value instanceof Number) {
                    result = ((Number) value).floatValue();
                } else {
                    if (value instanceof BytesRef) {
                        value = ((BytesRef) value).utf8ToString();
                    }
                    result = Float.parseFloat(value.toString());
                }
                validateParsed(result);
                return result;
            }
            @Override
            public Number parsePoint(byte[] value) {
                return HalfFloatPoint.decodeDimension(value, 0);
            }
            @Override
            public Float parse(XContentParser parser, boolean coerce) throws IOException {
                float parsed = parser.floatValue(coerce);
                validateParsed(parsed);
                return parsed;
            }
            @Override