ssh-remoting: Fix go to definition out of worktree (#18094)

Release Notes:

- ssh-remoting: Fixed go to definition outside of worktree

---------

Co-authored-by: Mikayla <mikayla@zed.dev>

crates/client/src/client.rs

@@ -1621,6 +1621,10 @@ impl ProtoClient for Client {
     fn message_handler_set(&self) -> &parking_lot::Mutex<ProtoMessageHandlerSet> {
         &self.handler_set
     }
+
+    fn goes_via_collab(&self) -> bool {
+        true
+    }
 }
 
 #[derive(Serialize, Deserialize)]