Propagate CanGc arguments through callers in constructors (#35541)

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

components/script/dom/offscreencanvas.rs

@@ -127,6 +127,7 @@ impl OffscreenCanvas {
             &self.global(),
             self,
             self.placeholder.as_deref(),
+            CanGc::note(),
         );
         *self.context.borrow_mut() = Some(OffscreenCanvasContext::OffscreenContext2d(
             Dom::from_ref(&*context),