PB-48: The order of product SKU is not respected if combined with category condition

- Adding cleanup steps to all pagebuilder MFTF tests for deleting uploaded images
- Adding documentation to actiongroups that upload images

Author: dhaecker

app/code/Magento/Cms/Test/Mftf/ActionGroup/SelectImageFromMediaStorageActionGroup.xml

@@ -52,7 +52,8 @@
 
     <actionGroup name="attachImage">
         <annotations>
-            <description>Uploads the provided Image to Media Gallery.</description>
+            <description>Uploads the provided Image to Media Gallery.
+                If you use this action group, you MUST add steps to delete the image in the "after" steps.</description>
         </annotations>
         <arguments>
             <argument name="Image"/>