Ignore a11yButtonClick (CMP-9069) (#2498)

Ignore flaky test until fix is ready (#2463)

## Release Notes
N/A

Author: MatkovIvan

compose/ui/ui/src/webTest/kotlin/androidx/compose/ui/platform/a11y/CfWA11YTest.kt

@@ -46,6 +46,7 @@ import org.w3c.dom.get
 
 class CfWA11YTest : OnCanvasTests {
 
+    @Ignore // Sometimes fails on latest firefox FIXME: https://youtrack.jetbrains.com/issue/CMP-9069
     @Test
     fun a11yButtonClick() = runApplicationTest {
         var clickCounter = 0