### Elasticsearch Version

8.11+

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

any

### Problem Description

While indexing documents with dynamically added fields, if multiple of those fields are objects are are deeper than 3-5 objects, performance is degraded significantly.

This bug was introduced in: https://github.com/elastic/elasticsearch/pull/90674

### Steps to Reproduce

I built a micro-benchmark to replicate this particular bug. 

But, any dynamic object parsing will cause this.

To mitigate the issue, statically mapped fields for objects is required. 

### Logs (if relevant)

Attached are two JFR files indicating the difference between when the bug was introduce vs. not.
[Archive 2.zip](https://github.com/elastic/elasticsearch/files/13569248/Archive.2.zip)

server/src/main/java/org/elasticsearch/index/mapper/DocumentParserContext.java
return mappingLookup.getMapping().getMetadataMapperByName(mapperName);
    }
    public final MappingParserContext dynamicTemplateParserContext(DateFormatter dateFormatter) {
        return mappingParserContext.createDynamicTemplateContext(dateFormatter);
    }
    public final SourceToParse sourceToParse() {
        return this.sourceToParse;
    }
    /**
     * Add the given {@code field} to the set of ignored fields.
     */
    public final void addIgnoredField(String field) {
        ignoredFields.add(field);
    }
    /**
     * Return the collection of fields that have been ignored so far.
     */
    public final Collection<String> getIgnoredFields() {
        return Collections.unmodifiableCollection(ignoredFields);
    }
    /**
     * Add the given {@code field} to the _field_names field
     *
     * Use this if an exists query run against the field cannot use docvalues
     * or norms.
     */
    public final void addToFieldNames(String field) {
        FieldNamesFieldMapper fieldNamesFieldMapper = (FieldNamesFieldMapper) getMetadataMapper(FieldNamesFieldMapper.NAME);
        if (fieldNamesFieldMapper != null) {
            fieldNamesFieldMapper.addFieldNames(this, field);