Ejecting a user sends both user ejected and user removed messages

[antobinary]

Ejecting a user sends both user ejected and user removed messages via PubSub.

This leads to bbb-html5 having to jump through hoops to be able to inform the user with the correct info.
It would be simpler if ejecting user only dispatched user ejected message (not user removed message which is linked to different flows)

Related:
#12057

[antobinary]

I believe this is resolved but let's confirm in 2.4 to be sure

[antobinary]

After a chat with @Tainan404 he recommended we merge the eject message into the remove message by adding a new field (or two?) -- reason for removal

Let's make sure we also handle the ban use cases.