Separate out user permissions in Help Center to prevent non-Support contacts from submitting requests

The use case is such that some of our products have very strict limitations on what client users can contact Support (E.g., a limit of 3 support contacts per client). In today's world, anyone with access to the Help Center can submit a request, and that is problematic. We still want these non-support contacts to have access to the Help Center for its other content, but not the ability to submit Support requests.