MC-15311: [Sec] PageBuilder XSS Injection Possible Through Block on HTML Code Content Type For CSS Classes Attribute & in TinyMCE

Fix static issues

Author: danmooney2

app/code/Magento/PageBuilder/Plugin/Filter/TemplatePlugin.php

@@ -112,7 +112,7 @@ public function afterFilter(\Magento\Framework\Filter\Template $subject, string
      *
      * @param \Magento\Framework\Filter\Template $subject
      * @param \Closure $proceed
-     * @param $construction
+     * @param string[] $construction
      * @return string
      */
     public function aroundCustomvarDirective(

dev/tests/integration/testsuite/Magento/PageBuilder/_files/custom_variable_xss.php

@@ -1,4 +1,8 @@
 <?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
 
 $this->objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();