ssh-remoting: Tidy up the code a bit after #18094 (#18102)

Release Notes:

- N/A

crates/remote/src/ssh_session.rs

@@ -471,7 +471,7 @@ impl ProtoClient for SshSession {
         &self.state
     }
 
-    fn goes_via_collab(&self) -> bool {
+    fn is_via_collab(&self) -> bool {
         false
     }
 }