Paginate project_runners in ci_cd settings

What does this MR do?

Adds pagination to the project -> settings -> CI/CD page to prevent a database timeout per the following issue #267028 (closed)

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
• [-] Separation of EE specific content

Availability and Testing