dom: Firing "click" event as synthetic pointer event (#36274)

According to specification

https://html.spec.whatwg.org/multipage/webappapis.html#fire-a-click-event
"Firing a click event at target means firing a synthetic pointer event
named click at target"

So need to replace synthetic mouse event with "click" type to pointer
event.

https://w3c.github.io/pointerevents/#the-click-auxclick-and-contextmenu-events
https://www.w3.org/TR/uievents/#event-type-click

Firing "click" event could be triggered from script or by UA:
- element.click()
(https://html.spec.whatwg.org/multipage/interaction.html#dom-click)
- form implicit submission
(https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#implicit-submission)
- keyboard activation (space)

---
- [x] ./mach build -d does not report any errors
- [x] ./mach test-tidy does not report any errors
- [x] There are tests for these changes
tests/wpt/tests/shadow-dom/event-composed.html
tests/wpt/tests/uievents/interface/click-event.htm

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

components/script/dom/pointerevent.rs

@@ -23,6 +23,13 @@ use crate::dom::mouseevent::MouseEvent;
 use crate::dom::window::Window;
 use crate::script_runtime::CanGc;
 
+/// <https://w3c.github.io/pointerevents/#dom-pointerevent-pointerid>
+#[derive(Clone, Copy, MallocSizeOf, PartialEq)]
+pub(crate) enum PointerId {
+    NonPointerDevice = -1,
+    Mouse,
+}
+
 #[dom_struct]
 pub(crate) struct PointerEvent {
     mouseevent: MouseEvent,
@@ -83,7 +90,6 @@ impl PointerEvent {
     #[allow(clippy::too_many_arguments)]
     pub(crate) fn new(
         window: &Window,
-        proto: Option<HandleObject>,
         type_: DOMString,
         can_bubble: EventBubbles,
         cancelable: EventCancelable,
@@ -119,7 +125,7 @@ impl PointerEvent {
     ) -> DomRoot<PointerEvent> {
         Self::new_with_proto(
             window,
-            proto,
+            None,
             type_,
             can_bubble,
             cancelable,