### 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
public Function<byte[], Number> pointReaderIfPossible() {
            if (isIndexed()) {
                return this::parsePoint;
            }
            return null;
        }
        @Override
        public IndexFieldData.Builder fielddataBuilder(FieldDataContext fieldDataContext) {
            FielddataOperation operation = fieldDataContext.fielddataOperation();
            if (fieldDataContext.fielddataOperation() == FielddataOperation.SEARCH) {
                failIfNoDocValues();
            }
            ValuesSourceType valuesSourceType = metricType == TimeSeriesParams.MetricType.counter
                ? TimeSeriesValuesSourceType.COUNTER
                : type.numericType.getValuesSourceType();
            if ((operation == FielddataOperation.SEARCH || operation == FielddataOperation.SCRIPT) && hasDocValues()) {
                return type.getFieldDataBuilder(name(), valuesSourceType);
            }
            if (operation == FielddataOperation.SCRIPT) {
                SearchLookup searchLookup = fieldDataContext.lookupSupplier().get();
                Set<String> sourcePaths = fieldDataContext.sourcePathsLookup().apply(name());
                return type.getValueFetcherFieldDataBuilder(
                    name(),
                    valuesSourceType,
                    searchLookup.source(),
                    sourceValueFetcher(sourcePaths)
                );
            }
            throw new IllegalStateException("unknown field data type [" + operation.name() + "]");
        }