Elasticsearch 9.2.8 Released — Remove _source field and update X-Pack security

AI Impact Summary

Elasticsearch 9.2.8 introduces significant changes, including the removal of the deprecated `_source` field and updates to the X-Pack security features. This release impacts applications relying on the older source retrieval method and necessitates a review of security configurations to align with the updated X-Pack implementation. The release also includes performance improvements and bug fixes, requiring thorough testing across impacted applications.