Add vulnerability status into details for trivy only

What does this MR do?

Add vulnerability status into details for trivy only.

Related issue: gitlab-org/gitlab#433385 (closed)

This change doesn't require a schema update as objects are already accepted under details.

Artifact example: gl-container-scanning-report.json

Vulnerability details

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog trailer added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer