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>

tests/wpt/meta/shadow-dom/event-composed.html.ini

@@ -1,3 +0,0 @@
-[event-composed.html]
-  [A UA click event should not be scoped]
-    expected: FAIL

tests/wpt/meta/uievents/interface/click-event.htm.ini

@@ -1,4 +0,0 @@
-[click-event.htm]
-  [synthetic click event is a PointerEvent]
-    expected: FAIL
-