### 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
i++;
                        continue;
                    }
                    executePipelines(
                        i,
                        pipelines.iterator(),
                        hasFinalPipeline,
                        indexRequest,
                        onDropped,
                        onFailure,
                        counter,
                        onCompletion,
                        originalThread
                    );
                    i++;
                }
            }
        });
    }
    private void executePipelines(
        final int slot,
        final Iterator<String> it,
        final boolean hasFinalPipeline,
        final IndexRequest indexRequest,
        final IntConsumer onDropped,
        final BiConsumer<Integer, Exception> onFailure,
        final AtomicInteger counter,
        final BiConsumer<Thread, Exception> onCompletion,
        final Thread originalThread
    ) {