Add "LS" to extension name

LS stands for "Legacy Stack", and is added to all 4.x extensions
to make it clear what is running on Legacy vs Symfony stack in 5.0

extension.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <software>
     <metadata>
-        <name>eZ Survey</name>
+        <name>eZ Survey LS</name>
         <version>//autogentag//</version>
         <copyright>Copyright (C) 1999-2012 eZ Systems AS</copyright>
         <license>//EZP_LICENSE//</license>