### 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/IngestDocument.java
index = Integer.parseInt(pathElement);
            } catch (NumberFormatException e) {
                return ResolveResult.error(
                    "[" + pathElement + "] is not an integer, cannot be used as an index as part of path [" + fullPath + "]"
                );
            }
            if (index < 0 || index >= list.size()) {
                return ResolveResult.error(
                    "[" + index + "] is out of bounds for array with length [" + list.size() + "] as part of path [" + fullPath + "]"
                );
            }
            return ResolveResult.success(list.get(index));
        }
        return ResolveResult.error(
            "cannot resolve ["
                + pathElement
                + "] from object of type ["
                + context.getClass().getName()
                + "] as part of path ["
                + fullPath
                + "]"
        );
    }
    /**
     * Appends the provided value to the provided path in the document.
     * Any non existing path element will be created.
     * If the path identifies a list, the value will be appended to the existing list.
     * If the path identifies a scalar, the scalar will be converted to a list and
     * the provided value will be added to the newly created list.
     * Supports multiple values too provided in forms of list, in that case all the values will be appended to the