Bump cluster applications to v0.40.0

What does this MR do?

Bump cluster applications to v0.40.0

- Bumps runner to 0.25.0
- Bump prometheus to 10.4.1

gitlab-org/cluster-integration/cluster-applications@v0.37.0...v0.40.0

Screenshots (strongly suggested)

Successful upgrade of Prometheus and Runner

https://staging.gitlab.com/hello-staging/hello-staging-cluster-management/-/jobs/38497560

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

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.