Fix unlabelled role mod test for card action and live region changes on main

#5900 removed the capture-phase click listener from the card root, so Chrome now leaves the role-less card out of the accessibility tree (role "none") instead of exposing it as "generic". Assert that neither card is a "figure" or a "form" instead.

The live region now reads the text of cards without "speak" (#5922), update the snapshot.

Author: Eugene Olonov

__tests__/html2/accessibility/adaptiveCard/hack.roleMod.unlabelled.html

@@ -75,16 +75,18 @@
         // THEN: Both cards should have no role, as "figure" and "form" without a name are announced without their content.
         expect(cardElements.map(cardElement => cardElement.getAttribute('role'))).toEqual([null, null]);
 
+        const cardRoles = (
+          await Promise.all(cardElements.map(cardElement => testHelpers.getAccessibilityNode(cardElement)))
+        ).map(({ role }) => role?.value);
+
         // THEN: Neither card should be a "figure" or a "form" in the accessibility tree.
-        expect(
-          (await Promise.all(cardElements.map(cardElement => testHelpers.getAccessibilityNode(cardElement)))).map(
-            ({ role }) => role?.value
-          )
-        ).toEqual(['generic', 'generic']);
+        // Without a role, Chrome may leave the card out of the accessibility tree (role "none") and expose its content directly.
+        expect(cardRoles).not.toContain('figure');
+        expect(cardRoles).not.toContain('form');
 
         await pageConditions.liveRegionStabilized();
 
-        // THEN: The live region shows what screen readers announce: "Bot said:", "A card:" for each card, then the input and the "Submit" button of the second card.
+        // THEN: The live region shows what screen readers announce: "Bot said:", "A card:" with the text of each card, then the input and the "Submit" button of the second card.
         await host.snapshot('local');
       });
     </script>