Change log for EXTREME_SWITCH

Date Changes
2023-12-19 Enhancement:
- Added a new Grok pattern to support new type of SYSLOG logs.
- Added new Grok patterns to parse "description".
- Mapped "protocol", "VrId", "SlppRxVlan", "SlppIncomingVlanId", "Type", "Cause" to "additional.fields".
- Mapped "session_id" to "network.session_id"
- Mapped "SlppSrcMacAddress" to "principal.mac".
- Mapped "intermediary_ip" to "intermediary.ip.
- Mapped "ver" to "metadata.version".
- Mapped "rcPortVLacpAdminEnable", "rcSyslogHostMapFatalSeverity", "rcSyslogHostMapWarningSeverity", "rcSyslogHostRowStatus", "rcSyslogHostFacility", "rcSyslogHostAddressType", "rcSyslogHostMapErrorSeverity", "rcSyslogHostMapInfoSeverity", "rcSyslogHostSeverity", "rcSyslogHostEnable" to "security_result.detection_fields".
- Mapped "port" to "principal.port".
- Mapped "rcSyslogHostAddress" to "principal.hostname".
2023-12-11 - Newly created parser.