Fix lable applying logic for PI dangerbot

What does this MR do?

Fix logic to apply product intelligence labels on MR instead of adding them into comment body

Screenshots (strongly suggested)

Label are included in the comment instead of being applied to MR:

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because it is a tooling change.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Separation of EE specific content