Encrypt CI/CD builds tokens

What does this MR do?

Encrypt CI/CD build tokens in the database.

What are the relevant issue numbers?

Closes #52342

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the database guides
• Security reports checked/validated by reviewer