Allow anonymously accessible KB articles to be viewed without logging in

If an agent shares a knowledge base article with a customer and that article is anonymously accessible, then allow customers to view it without logging in to the JSD portal.

This is a common scenario for email requests, where the customer does not necessarily know how to log into the portal.

Steps:

1. Create a KB link from a Service Desk project to an anonymously accessible Confluence space
2. As a customer, create a request on the portal
3. As an agent, in agent view, view the request and search for an article in the Related knowledge base articles panel and view it
4. Use the "Share as comment" button to share the KB article with the customer (note: the link looks something like ".../servicedesk/customer/kb/view/...")

Desired outcome:

The customer can click on the link to the shared article and view it without logging in.

Actual outcome:

The customer is presented with the JSD portal login screen before they can view the article (if not already logged in).

Workaround:

If the KB article is viewed in Confluence (not embedded inside the JSD portal), the user will not have to log in.

Agents can get a link to the underlying Confluence page by opening the search results in a new tab or copying the address.