Change log for IBM_LTO

Date Changes
2026-06-09 - Added new grok patterns to parse new format of SYSLOG logs.
- `event.idm.read_only_udm.metadata.product_event_type`: Newly mapped `product_event_type` field with `event.idm.read_only_udm.metadata.product_event_type` UDM field.
- `event.idm.read_only_udm.additional.fields`: Newly mapped `error_code` and `location` raw log fields with `event.idm.read_only_udm.additional.fields` UDM field.
- `event.idm.read_only_udm.metadata.event_type`: Mapped `event.idm.read_only_udm.metadata.event_type` as `USER_LOGIN` when `action_message` is "logged in".
- `event.idm.read_only_udm.metadata.event_type`: Mapped `event.idm.read_only_udm.metadata.event_type` as `USER_LOGOUT` when `action_message` is "logged out".
2024-05-02 - Newly created parser.