feat: enhance CloudTrail log encoder with extra attributes

[Kavindu-Dodan]

Description

Enhance the CloudTrail log encoder by adding additional/missing fields. Given below are new fields and their mappings,

CloudTrail field	Attribute in OpenTelemetry log
apiVersion	aws.cloudtrail.api_version
additionalEventData	aws.additional_event_data(map of all additional event data)
userIdentity.accountId	aws.user_identity.account_id
userIdentity.invokedBy	aws.user_identity.invoked_by
userIdentity.sessionContext.attributes.creationDate	aws.user_identity.session_context.attributes.creation_date
userIdentity.sessionContext.attributes.mfaAuthenticated	aws.user_identity.session_context.attributes.mfa_authenticated
userIdentity.sessionContext.sessionIssuer.type	aws.user_identity.session_context.issuer.type
userIdentity.sessionContext.sessionIssuer.principalId	aws.user_identity.session_context.issuer.principal_id
userIdentity.sessionContext.sessionIssuer.arn	aws.user_identity.session_context.issuer.arn
userIdentity.sessionContext.sessionIssuer.accountId	aws.user_identity.session_context.issuer.account_id
userIdentity.sessionContext.sessionIssuer.userName	aws.user_identity.session_context.issuer.user_name

Official documentation links to refer details on these fields,

• apiVersion : https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-event-reference-record-contents.html
• additionalEventData: https://docs.aws.amazon.com/singlesignon/latest/userguide/sign-in-events-examples.html
• userIdentity.invokedBy : https://docs.aws.amazon.com/awscloudtrail/latest/userguide/non-api-aws-service-events.html
• userIdentity.sessionContext : https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-event-reference-user-identity.html

Link to tracking issue

Completes first part of #43403

Testing

Validated the parsing with publicly available AWS CloudWatch logs. Further added additional logs for end-to-end validation.

Documentation

Updated Original to OTel log attributes table of the documentation.

[Kavindu-Dodan]

@axw @constanca-m appreciate a review. Also let me know if the choice of attribute names looks fine.

[constanca-m]

Looks good apart from one thing, thanks for the contribution!

[axw]

Thanks @Kavindu-Dodan!

[Kavindu-Dodan]

Thanks @axw for the review and @atoulme for the approval.

I do not have merge rights, so feel free to merge on behalf of me :)

[otelbot]

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