### Description

This is a followup to #85926.

As part of the ingest processing pipeline, we call `CollectionUtils.ensureNoSelfReferences(...)` to ensure that a script processor didn't accidentally introduce a circular object. However, this check is only necessary if we know there was the potential for a circular option, which can only happen with either a custom processor (a plugin where we have no control), or a script processor. We should be able to only call this sanity check if we know we need it, rather than for every document.
server/src/main/java/org/elasticsearch/ingest/IngestService.java
}
    private void innerExecute(
        int slot,
        IndexRequest indexRequest,
        Pipeline pipeline,
        IntConsumer itemDroppedHandler,
        Consumer<Exception> handler
    ) {
        if (pipeline.getProcessors().isEmpty()) {
            handler.accept(null);
            return;
        }
        long startTimeInNanos = System.nanoTime();
        
        
        totalMetrics.preIngest();
        String index = indexRequest.index();
        String id = indexRequest.id();
        String routing = indexRequest.routing();
        Long version = indexRequest.version();
        VersionType versionType = indexRequest.versionType();
        Map<String, Object> sourceAsMap = indexRequest.sourceAsMap();
        IngestDocument ingestDocument = new IngestDocument(index, id, routing, version, versionType, sourceAsMap);
        ingestDocument.executePipeline(pipeline, (result, e) -> {
            long ingestTimeInNanos = System.nanoTime() - startTimeInNanos;
            totalMetrics.postIngest(ingestTimeInNanos);
            if (e != null) {
                totalMetrics.ingestFailed();
                handler.accept(e);
            } else if (result == null) {