Add ability to refresh expected JSON

What does this MR do?

Rebuilding the expected JSON is a pain. This MR updates the spec file so when ./analyzer-refresh-expected-json runs within the project, the expected JSON is updated and sanitized.

gitlab-org/secure/tools/analyzer-scripts!29 (closed) enables this in the analyzer-refresh-expected-json script.

This change was tested as part of !88 (merged)

What are the relevant issue numbers?

NA

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
  • 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