### 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/action/index/IndexRequest.java
}
        if (source.length == 2 && source[0] instanceof BytesReference && source[1] instanceof Boolean) {
            throw new IllegalArgumentException(
                "you are using the removed method for source with bytes and unsafe flag, the unsafe flag"
                    + " was removed, please just use source(BytesReference)"
            );
        }
        try {
            XContentBuilder builder = XContentFactory.contentBuilder(xContentType);
            builder.startObject();
            for (int i = 0; i < source.length; i++) {
                builder.field(source[i++].toString(), source[i]);
            }
            builder.endObject();
            return source(builder);
        } catch (IOException e) {
            throw new ElasticsearchGenerationException("Failed to generate", e);
        }
    }
    /**
     * Sets the document to index in bytes form.
     */
    public IndexRequest source(BytesReference source, XContentType xContentType) {
        this.source = Objects.requireNonNull(source);
        this.contentType = Objects.requireNonNull(xContentType);
        return this;
    }
    /**
     * Sets the document to index in bytes form.
     */