### 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
updateCheck.check.accept(mapper);
            
            merge(mapperService, updateCheck.update);
            mapper = (FieldMapper) mapperService.documentMapper().mappers().getMapper("field");
            updateCheck.check.accept(mapper);
        }
        for (String param : checker.conflictChecks.keySet()) {
            MapperService mapperService = createMapperService(checker.conflictChecks.get(param).init);
            
            merge(mapperService, checker.conflictChecks.get(param).init);
            
            Exception e = expectThrows(
                IllegalArgumentException.class,
                "No conflict when updating parameter [" + param + "]",
                () -> merge(mapperService, checker.conflictChecks.get(param).update)
            );
            assertThat(
                e.getMessage(),
                anyOf(containsString("Cannot update parameter [" + param + "]"), containsString("different [" + param + "]"))
            );
        }
        assertParseMaximalWarnings();
    }
    public final void testTextSearchInfoConsistency() throws IOException {
        MapperService mapperService = createMapperService(fieldMapping(this::minimalMapping));
        MappedFieldType fieldType = mapperService.fieldType("field");
        if (fieldType.getTextSearchInfo() == TextSearchInfo.NONE) {
            expectThrows(IllegalArgumentException.class, () -> fieldType.termQuery(null, null));
        } else {
            SearchExecutionContext searchExecutionContext = createSearchExecutionContext(mapperService);