MQE-2046: remove deprecated entities usages in MFTF tests

Author: jilu1

app/code/Magento/Backend/Test/Mftf/Section/AdminMessagesSection.xml

@@ -9,12 +9,20 @@
 <sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
     <section name="AdminMessagesSection">
-        <element name="success" type="text" selector=".message-success"/>
+        <!-- Keep both Set1 and Set2 elements -->
+        <!-- Neither Set1 nor Set2 works for all Magento blocks -->
+        <!-- Set1 -->
+        <element name="success" type="text" selector="#messages div.message-success"/>
         <element name="nthSuccess" type="text" selector=".message.message-success.success:nth-of-type({{n}})>div" parameterized="true"/>
-        <element name="error" type="text" selector=".message.message-error.error"/>
+        <element name="error" type="text" selector="#messages div.message-error"/>
         <element name="notice" type="text" selector=".message.message-notice.notice"/>
         <element name="messageByType" type="text" selector="#messages div.message-{{messageType}}" parameterized="true" />
-        <element name="warning" type="text" selector=".message-warning"/>
+        <element name="warning" type="text" selector="#messages div.message-warning"/>
         <element name="accessDenied" type="text" selector=".access-denied-page"/>
+        <!-- Set2 -->
+        <element name="successMessage" type="text" selector=".message-success"/>
+        <element name="errorMessage" type="text" selector=".message.message-error.error"/>
+        <element name="warningMessage" type="text" selector=".message-warning"/>
+        <element name="noticeMessage" type="text" selector=".message-notice"/>
     </section>
 </sections>