Make tests less noisy (#12463)

When running the tests for linux, I found a lot of benign errors getting
logged. This PR cuts down some of the noise from unnecessary workspace
serialization and SVG renders

Release Notes:

- N/A

crates/workspace/src/shared_screen.rs

@@ -119,7 +119,7 @@ impl Item for SharedScreen {
 
     fn clone_on_split(
         &self,
-        _workspace_id: WorkspaceId,
+        _workspace_id: Option<WorkspaceId>,
         cx: &mut ViewContext<Self>,
     ) -> Option<View<Self>> {
         let track = self.track.upgrade()?;