Exclude suppressions reported by semgrep in the artifact

What does this MR do?

• Includes suppressions property during .sarif file serialization.
• Skips to include the finding in the artifact if a sarif result has suppressions array property. However, if one of the array elements in the supressions has status property value as underReview or rejected, the finding will be included in the artifact.

What are the relevant issue numbers?

gitlab-org/gitlab#344616 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry 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
• Ensure the report version matches the equivalent schema version
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer