### 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
}
        /**
         * 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 EnumMap<Metric, NumberFieldMapper> metricFieldMappers;
    private final boolean ignoreMalformed;
    private final boolean ignoreMalformedByDefault;
    private final Version indexCreatedVersion;
    
    private final EnumSet<Metric> metrics;
    
    protected Metric defaultMetric;
    
    private final TimeSeriesParams.MetricType metricType;
    private AggregateDoubleMetricFieldMapper(
        String simpleName,
        MappedFieldType mappedFieldType,
        EnumMap<Metric, NumberFieldMapper> metricFieldMappers,
        Builder builder
    ) {
        super(simpleName, mappedFieldType, MultiFields.empty(), CopyTo.empty());
        this.ignoreMalformed = builder.ignoreMalformed.getValue();
        this.ignoreMalformedByDefault = builder.ignoreMalformed.getDefaultValue();
        this.metrics = builder.metrics.getValue();
        this.defaultMetric = builder.defaultMetric.getValue();