Change log for OPENSSH

Date Changes
2024-01-23 Enhancement:
- Modified a Grok pattern to parse the entire value in target.user.userid.
2023-10-05 Enhancement:
- Modified the existing mapping: target.file.sha256 mapped to network.tls.client.certificate.sha256.
2023-08-25 Enhancement:
- Added a Grok pattern to parse unparsed logs and mapped the fields accordingly.
2023-05-05 Enhancement:
- Modified the existing mapping, principal.hostname mapped to target.hostanme.
2022-10-25 Enhancement:
Added and modified GROK pattern for message and description fields.
Mapped pwd to target.file.full_path.
Mapped Sha256 to target.file.sha256.
Mapped command to target.process.command_line.
Mapped tty to security_result.about.resource.attribute.labels.
Mapped metadata.event_type as STATUS_UPDATE wherever possible.
2022-05-18 User login action logs such as auth success - with public key, auth success - with password, auth fail with password are handled.
Mapped USER_LOGIN to metadata.event_type.
Mapped User name to target.user.userid.
Mapped Source ip to principal.ip.
Mapped Source port to principal.port.
Mapped MECHANISM_UNSPECIFIED to extensions.auth.mechanism.