### 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
private final Parameter<Boolean> indexed = Parameter.indexParam(m -> toType(m).indexed, true);
        private final Parameter<Boolean> hasDocValues = Parameter.docValuesParam(m -> toType(m).hasDocValues, true);
        private final Parameter<Boolean> stored = Parameter.storeParam(m -> toType(m).stored, false);
        private final Parameter<Explicit<Boolean>> ignoreMalformed;
        private final Parameter<Explicit<Boolean>> coerce;
        private final Parameter<Number> nullValue;
        private final Parameter<Script> script = Parameter.scriptParam(m -> toType(m).script);
        private final Parameter<String> onScriptError = Parameter.onScriptErrorParam(m -> toType(m).onScriptError, script);
        /**
         * Parameter that marks this field as a time series dimension.
         */
        private final Parameter<Boolean> dimension;
        /**
         * Parameter that marks this field as a time series metric defining its time series metric type.
         * For the numeric fields gauge and counter metric types are
         * supported
         */
        private final Parameter<MetricType> metric;
        private final Parameter<Map<String, String>> meta = Parameter.metaParam();
        private final ScriptCompiler scriptCompiler;
        private final NumberType type;
        private boolean allowMultipleValues = true;
        private final Version indexCreatedVersion;
        public Builder(String name, NumberType type, ScriptCompiler compiler, Settings settings, Version indexCreatedVersion) {
            this(name, type, compiler, IGNORE_MALFORMED_SETTING.get(settings), COERCE_SETTING.get(settings), indexCreatedVersion);
        }
        public static Builder docValuesOnly(String name, NumberType type, Version indexCreatedVersion) {