Improved error reporting for semgrep analyzer

What does this MR do?

Extend the command module to support the generation of error reports so that failing states are still recorded and can be used in observability events.

What are the relevant issue numbers?

Gracefully generate error reports in the presen... (gitlab-org/gitlab#546356 - closed) • Julian Thome • 18.1 • On track

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 updated/added for this feature/bug
• Job definition updated, if necessary
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• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer