Add custom cop to prevent permissions enabling permissions
What does this MR do and why?
This MR adds a custom rubocop cop that identifies instances of permissions enabling other permissions.
References
https://gitlab.com/gitlab-org/gitlab/-/issues/523519
How to set up and validate locally
Checkout the branch and run rubocop on any policy. Ex:
rubocop app/policies/project_policy.rbMR acceptance checklist
Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.