### 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_
test/framework/src/main/java/org/elasticsearch/index/mapper/MapperTestCase.java
public void testMinimalToMaximal() throws IOException {
        XContentBuilder orig = JsonXContent.contentBuilder().startObject();
        createMapperService(fieldMapping(this::minimalMapping)).documentMapper().mapping().toXContent(orig, INCLUDE_DEFAULTS);
        orig.endObject();
        XContentBuilder parsedFromOrig = JsonXContent.contentBuilder().startObject();
        createMapperService(orig).documentMapper().mapping().toXContent(parsedFromOrig, INCLUDE_DEFAULTS);
        parsedFromOrig.endObject();
        assertEquals(Strings.toString(orig), Strings.toString(parsedFromOrig));
        assertParseMaximalWarnings();
    }
    protected final void assertParseMinimalWarnings() {
        String[] warnings = getParseMinimalWarnings();
        if (warnings.length > 0) {
            assertWarnings(warnings);
        }
    }
    protected final void assertParseMaximalWarnings() {
        String[] warnings = getParseMaximalWarnings();
        if (warnings.length > 0) {
            assertWarnings(warnings);
        }
    }
    protected String[] getParseMinimalWarnings() {
        
        return Strings.EMPTY_ARRAY;
    }
    protected String[] getParseMaximalWarnings() {
        
        return Strings.EMPTY_ARRAY;