[fenix] Closes https://github.com/mozilla-mobile/fenix/issues/21332: Ignore intermittently failing WebPushEngineIntegrationTest

app/src/test/java/org/mozilla/fenix/push/WebPushEngineIntegrationTest.kt

@@ -32,6 +32,7 @@ import org.junit.Assert.assertNotNull
 import org.junit.Assert.assertNull
 import org.junit.Assert.assertTrue
 import org.junit.Before
+import org.junit.Ignore
 import org.junit.Test
 
 class WebPushEngineIntegrationTest {
@@ -88,6 +89,7 @@ class WebPushEngineIntegrationTest {
     }
 
     @Test
+    @Ignore("Intermittent failing test on JDK11: https://github.com/mockk/mockk/issues/598")
     fun `delegate calls getSubscription`() {
         integration.start()
         var subscribeFn: ((AutoPushSubscription?) -> Unit)? = null