Add missing rbac when debugging services
What does this MR do?
This MR complements gitlab-org/charts/gitlab-runner#495 (closed) and gitlab-org/charts/gitlab-runner!442 (merged)
Why was this MR needed?
To be consistent with the rbac permissions set and the documentation provided.
What are the relevant issue numbers?
- Original issue: gitlab-org/charts/gitlab-runner#495 (closed)
- Complementary issue: gitlab-org/charts/gitlab-runner!442 (merged)