Issue #3351596 by dww, catch: Skip Drupal\Tests\ckeditor5\FunctionalJavascript\MediaLibraryTest

(cherry picked from commit 56a7a8e2)

core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLibraryTest.php

@@ -149,6 +149,9 @@ function (ConstraintViolation $v) {
    * Tests using drupalMedia button to embed media into CKEditor 5.
    */
   public function testButton() {
+    // Skipped due to frequent random test failures.
+    // @todo Fix this and stop skipping it at https://www.drupal.org/i/3351597.
+    $this->markTestSkipped();
     $media_preview_selector = '.ck-content .ck-widget.drupal-media .media';
     $this->drupalGet('/node/add/blog');
     $this->waitForEditor();