Change log for NETSCOUT_OCI

Date Changes
2024-02-21 Enhancement:
- Added support for new version of Syslog CEF logs.
- Mapped url to target.url.
- Mapped app to target.application.
- When src_iporhost is a valid IP, then mapped it to principal.ip or else mapped it to principal.hostname.
- Mapped mitreTactic, mitreTechnique, srcCount, dstCount, srcHostGroupCount, dstHostGroupCount, interfaceCount, violationCount, dstHostGroup, and srcHostGroup to security_result.detection_fields.
- Removed desc mapping to security_result.description as it is already being mapped to metadata.description.
- Mapped iocDescription to security_result.description.
- Mapped Category to security_result.category_details.
- Mapped Policy and Classification to additional.fields.
2023-09-04 Newly created parser.