An organization owner keeps read-only access to the teams of their
organization even when they are not a member, so removing them from a
team was navigating them away from content they are still allowed to
see, and they could walk right back in through the URL.
Publish a :team-role-change to :viewer for them instead of a
:team-membership-change, which reuses the existing real-time role
transition on both the dashboard and the workspace. Any other member is
notified as before.
Signed-off-by: Juanfran <juanfran.ag@gmail.com>