Add debug logs for command flags

What does this MR do?

This MR adds debug logs for the command flags, in order to make for an easier support experience.

What are the relevant issue numbers?

gitlab-org/gitlab#361839 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Add debug log security risk warning
• 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
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer