Change log for FORTINET_FORTIAUTHENTICATOR

Date Changes
2025-05-06 - SYSLOG : Added support for SYSLOG Format.
- event.idm.read_only_udm.principal.hostname: Removed mapping of prin_hostname from event.idm.read_only_udm.principal.hostname UDM field.
- event.idm.read_only_udm.intermediary.hostname: Mapped prin_hostname raw log field with event.idm.read_only_udm.intermediary.hostname UDM field
2024-08-29 - Added support for the new format of KV logs.
2024-06-18 - Newly created parser.