refactor: propagate CanGc arguments through callers (#35591)

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

components/script/dom/htmlmeterelement.rs

@@ -86,6 +86,7 @@ impl HTMLMeterElement {
                 ShadowRootMode::Closed,
                 false,
                 SlotAssignmentMode::Manual,
+                can_gc,
             )
             .expect("Attaching UA shadow root failed");