Adds calls_gitaly to label DetailedStatus

What does this MR do?

Adds calls_gitaly to the label field in Ci::DetailedStatusType. I noticed the bug while working on feature specs:

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides