Change log for CYBERARK

Date Changes
2024-04-30 Enhancement:
- Added "affected user name", "reason", "app" and "device type" fields
in additional UDM field.
2024-04-05 Enhancement:
- Added a Grok pattern to parse the new format of SYSLOG logs.
2022-10-10 - Declared fields "cs2","FileQualifier","msg","shost","dhost".
- Mapped "metadata.event_type" to "STATUS_UPDATE" where "metadata.event_type" is "GENERIC_EVENT" and "shost" is not null and "dhost" is null.