### 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.
libs/x-content/src/main/java/org/elasticsearch/xcontent/XContentBuilder.java
return responseContentType.responseContentTypeHeader();
    }
    public XContentType contentType() {
        return generator.contentType();
    }
    /**
     * @return the output stream to which the built object is being written. Note that is dangerous to modify the stream.
     */
    public OutputStream getOutputStream() {
        return bos;
    }
    public XContentBuilder prettyPrint() {
        generator.usePrettyPrint();
        return this;
    }
    public boolean isPrettyPrint() {
        return generator.isPrettyPrint();
    }
    /**
     * Indicate that the current {@link XContentBuilder} must write a line feed ("\n")
     * at the end of the built object.
     * <p>
     * This only applies for JSON XContent type. It has no effect for other types.
     */
    public XContentBuilder lfAtEnd() {
        generator.usePrintLineFeedAtEnd();
        return this;
    }
    /**
     * Set the "human readable" flag. Once set, some types of values are written in a