Fix for #20716: "Our analytics" can be confusing when user does not have...

Fix for #20716: "Our analytics" can be confusing when user does not have access to that collection (#23887)

* Change collection endpoints to not return root collection if user doesn't have Root permission

* hide our analytics collection in saved question picker when users do not have access

* Fix tests

Co-authored-by: Aleksandr Lesnenko <alxnddr@gmail.com>