Resolve #3264834 "No authenticated user"
requested to merge issue/layout_builder_restrictions_by_role-3264834:3264834-no-authenticated-user into 1.0.x
Closes #3264834
This MR allows allows admins to add restrictions for the Authenticated User role. This is required when Layout Builder access is controlled via other means and site-wide roles aren't available. For example, when opening up LB permissions to Group roles.