MC-4259: Fix Skipped MTF Test CreateWidgetHierarchyNodeLinkTestVariation2_0

 - remove page override and update selector to be compatible with core & PB pages

Author: cspruiell

dev/tests/functional/tests/app/Magento/Cms/Test/Page/CmsPage.xml

@@ -7,6 +7,6 @@
  -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../../vendor/magento/mtf/etc/pages.xsd">
     <page name="CmsPage" mca="cms/page" module="Magento_Cms">
-        <block name="cmsPageBlock" class="Magento\Cms\Test\Block\Page" locator=".page-main" strategy="css selector" />
+        <block name="cmsPageBlock" class="Magento\Cms\Test\Block\Page" locator="#maincontent" strategy="css selector" />
     </page>
 </config>