add privilege that controls access to health check summary report

I've granted every healthcheck and iq privilege there is to a user, and they still do not have permissions to view the healthcheck summary report.

It should be possible for a non-admin user to view both the summary and the detail health check report in Nexus 3.

This was tested in both Nexus 3.2.1 and 3.3.0-SNAPSHOT.

A support zip with my test configuration is attached, the test user has credentials "test:test".