### 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
Builder builder = new Builder(name, type, ScriptCompiler.NONE, false, false, indexCreatedVersion);
            builder.indexed.setValue(false);
            builder.dimension.setValue(false);
            return builder;
        }
        public Builder(
            String name,
            NumberType type,
            ScriptCompiler compiler,
            boolean ignoreMalformedByDefault,
            boolean coerceByDefault,
            Version indexCreatedVersion
        ) {
            super(name);
            this.type = type;
            this.scriptCompiler = Objects.requireNonNull(compiler);
            this.indexCreatedVersion = Objects.requireNonNull(indexCreatedVersion);
            this.ignoreMalformed = Parameter.explicitBoolParam(
                "ignore_malformed",
                true,
                m -> toType(m).ignoreMalformed,
                ignoreMalformedByDefault
            );
            this.coerce = Parameter.explicitBoolParam("coerce", true, m -> toType(m).coerce, coerceByDefault);
            this.nullValue = new Parameter<>(
                "null_value",
                false,
                () -> null,
                (n, c, o) -> o == null ? null : type.parse(o, false),
                m -> toType(m).nullValue,