AX: Update the isolated tree in response to dynamic aria-grabbed and aria-posinset...

AX: Update the isolated tree in response to dynamic aria-grabbed and aria-posinset changes
https://bugs.webkit.org/show_bug.cgi?id=240844

Reviewed by Chris Fleizach.

Added test cases to accessibility/aria-setsize-posinset.html and
accessibility/mac/aria-drag-drop.html.

* Source/WebCore/accessibility/AXLogger.cpp:
(WebCore::operator<<):
* Source/WebCore/accessibility/AXObjectCache.cpp:
(WebCore::AXObjectCache::handleAttributeChange):
(WebCore::AXObjectCache::updateIsolatedTree):
* Source/WebCore/accessibility/AXObjectCache.h:
* Source/WebCore/accessibility/isolatedtree/AXIsolatedTree.cpp:
(WebCore::AXIsolatedTree::updateNodeProperty):
* LayoutTests/accessibility/aria-setsize-posinset-expected.txt:
* LayoutTests/accessibility/aria-setsize-posinset.html:
* LayoutTests/accessibility/mac/aria-drag-drop-expected.txt:
* LayoutTests/accessibility/mac/aria-drag-drop.html:

link: https://commits.webkit.org/250995@main
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@294863 268f45cc-cd09-0410-ab3c-d52691b4dbfc