Portfolio access control policy should inherit permissions to child projects

### Current Behavior

If portfolio access control policy limits access to a specific project and this project has child projects assigned an account only having a policy to access the parent does not have access to its childs.

### Proposed Behavior

Access permissions and portfolio access control policies on a parent project should be inherited to all child projects

### Checklist

- [x] I have read and understand the [contributing guidelines](https://github.com/DependencyTrack/dependency-track/blob/master/CONTRIBUTING.md#filing-issues)
- [x] I have checked the [existing issues](https://github.com/DependencyTrack/frontend/issues) for whether this enhancement was already requested