Add has_trace to `Projects::JobController#show.json`

What does this MR do?

Add has_trace to Projects::JobController#show.json response

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides

Closes #51925 (closed)