revert single channel click (#7738)

- Revert "collab tweaks (#7706)"
- Revert "2112 (#7640)"
- Revert "single click channel (#7596)"
- Reserve protobufs
- Don't revert migrations

Release Notes:

- N/A

**or**

- N/A

crates/collab/src/db/tables/room_participant.rs

@@ -20,7 +20,6 @@ pub struct Model {
     pub calling_connection_server_id: Option<ServerId>,
     pub participant_index: Option<i32>,
     pub role: Option<ChannelRole>,
-    pub in_call: bool,
 }
 
 impl Model {