canvas: Make OffscreenCanvas transferable (without placeholder) (#37872)

Follow the specification and make OffscreenCanvas objects are
transferable,
but not in case if there are a weak reference to placeholder canvas
element.
To handle it properly need to implement dedicated frame
provider/dispatcher
between canvas element (script thread) and offscreen canvas (dedicated
worker thread).

https://html.spec.whatwg.org/multipage/#the-offscreencanvas-interface:transferable-objects

Testing: Improvements in the following tests
-
html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.detachedcanvas.html
-
html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob*
-
html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer*
-
html/infrastructure/safe-passing-of-structured-data/transfer-errors.window.js

Part of #24276

Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>

components/script/canvas_state.rs

@@ -651,6 +651,7 @@ impl CanvasState {
                         smoothing_enabled,
                     ));
                 },
+                OffscreenRenderingContext::Detached => return Err(Error::InvalidState),
             }
         } else {
             self.send_canvas_2d_msg(Canvas2dMsg::DrawEmptyImage(
@@ -719,6 +720,7 @@ impl CanvasState {
                                 source_rect,
                                 smoothing_enabled,
                             )),
+                        OffscreenRenderingContext::Detached => return Err(Error::InvalidState),
                     }
                 },
                 _ => return Err(Error::InvalidState),