Change log for AZURE_GATEWAY

Date	Changes
2024-06-20	Enhancement: - Added support for a new pattern of unparsed JSON logs. - Mapped "instanceId" to "principal.application". - Mapped "sslEnabled" and "upstreamSourcePort" to "additional.fields".
2024-04-19	Enhancement: - Added support for multiple event JSON logs.
2023-12-22	Enhancement: - Mapped "resourceid" to "target.resource.id". - Mapped "properties.operationStatus" to "security_result.category_details". - Mapped "properties.configuration.Name" to "principal.hostname". - Mapped "properties.message" to "metadata.description". - Mapped "properties.configuration.RemoteStie" to "target.hostname". - Mapped "level" to "security_result.severity_details". - Mapped "properties.configuration.Ikeversion" to "principal.resource.attribute.labels". - Mapped "properties.configuration.LocalTunnelEndpoint" to "principal.ip". - Mapped "properties.configuration.RemoteTunnelEndpoint" to "target.ip". - Mapped "properties.configuration.LocalSubnets", "properties.configuration.RemoteSubnets", "properties.configuration.VirtualNetworkRanges", and "properties.configuration.VirtualNetworkSubnets" to "principal.resource.attribute.labels". - Mapped "properties.configuration.VIPAddress" to "principal.ip". - Mapped "properties.configuration.BgpConfiguration.GatewayConfig.PeerAddress" to "targrt.ip". - Mapped "properties.configuration.BgpConfiguration.GatewayConfig.PeerType" and "properties.configuration.BgpConfiguration.GatewayConfig.Asn" to "security_result.detection_fields".
2023-11-16	- Newly created parser.