MQE-2220: updated mftf version to ^3.0

 - removed deprecated action groups as they are removed from 2.4.0
 - fixed test annotation errors

Author: jilu1

app/code/Magento/Backup/Test/Mftf/ActionGroup/deleteBackupActionGroup.xml

@@ -14,6 +14,7 @@
             <stories value="Wishlist items deleting"/>
             <title value="Admin deletes an item from customer wishlist"/>
             <description value="Admin Should be able delete items from customer wishlist"/>
+            <severity value="AVERAGE"/>
             <testCaseId value="MC-35170"/>
             <group value="wishlist"/>
         </annotations>

app/code/Magento/Indexer/Test/Mftf/ActionGroup/IndexerActionGroup/UpdateIndexerOnSaveActionGroup.xml

@@ -15,6 +15,7 @@
             <title value="Wishlist Functionality is disabled in system configurations and not visible on FE"/>
             <description value="Customer should not see wishlist functionality if it's disabled"/>
             <testCaseId value="MC-35200"/>
+            <severity value="AVERAGE"/>
             <group value="wishlist"/>
             <group value="configuration"/>
         </annotations>

app/code/Magento/Wishlist/Test/Mftf/Test/AdminDeleteCustomerWishListItemTest.xml

@@ -15,6 +15,7 @@
             <title value="Sharing wishlist with more than Maximum Allowed Emails qty"/>
             <description value="Customer should not have a possibility share wishlist with more than maximum allowed emails qty"/>
             <testCaseId value="MC-35167"/>
+            <severity value="AVERAGE"/>
             <group value="wishlist"/>
             <group value="configuration"/>
         </annotations>

app/code/Magento/Wishlist/Test/Mftf/Test/StorefrontDisabledCustomerWishlistFunctionalityTest.xml

@@ -88,7 +88,7 @@
         "friendsofphp/php-cs-fixer": "~2.16.0",
         "lusitanian/oauth": "~0.8.10",
         "magento/magento-coding-standard": "*",
-        "magento/magento2-functional-testing-framework": "3.0.0-RC5",
+        "magento/magento2-functional-testing-framework": "^3.0",
         "pdepend/pdepend": "~2.7.1",
         "phpcompatibility/php-compatibility": "^9.3",
         "phpmd/phpmd": "^2.8.0",