### 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 (e.getCause() instanceof IllegalStateException) {
                        throw new IllegalArgumentException(
                            "Field ["
                                + name()
                                + "] of type ["
                                + typeName()
                                + "] does not support indexing multiple values for the same field in the same document"
                        );
                    } else if (e.getCause()instanceof IOException exception) {
                        
                        throw exception;
                    } else {
                        throw e;
                    }
                }
                
                if (Metric.value_count == metric) {
                    
                    
                    Number n = context.doc().getByKey(delegateFieldMapper.name()).numericValue();
                    if (n.intValue() < 0) {
                        throw new IllegalArgumentException(
                            "Aggregate metric [" + metric.name() + "] of field [" + mappedFieldType.name() + "] cannot be a negative number"
                        );
                    }
                } else if (Metric.max == metric) {
                    max = context.doc().getByKey(delegateFieldMapper.name()).numericValue();
                } else if (Metric.min == metric) {
                    min = context.doc().getByKey(delegateFieldMapper.name()).numericValue();
                }