MQE-1384: Deliver weekly MTF to MFTF conversion

- Use amOnPage instead of interacting with the navbar in AdminDeleteCartPriceRuleForRetailerActionGroup

Author: tomreece

app/code/Magento/SalesRule/Test/Mftf/ActionGroup/AdminCreateCartPriceRuleActionGroup.xml

@@ -26,9 +26,7 @@
 
     <!--Delete Cart price Rule for Retailer customer-->
     <actionGroup name="AdminDeleteCartPriceRuleForRetailerActionGroup">
-        <click selector="{{AdminMenuSection.marketing}}" stepKey="clickOnMarketing" />
-        <waitForPageLoad stepKey="waitForMarketing"/>
-        <click selector="{{CartPriceRulesSubmenuSection.cartPriceRules}}" stepKey="clickOnCartPriceRules"/>
+        <amOnPage url="{{AdminCartPriceRulesPage.url}}" stepKey="goToCartPriceRules"/>
         <waitForPageLoad stepKey="waitForCartPriceRules"/>
         <fillField selector="{{AdminCartPriceRulesSection.filterByNameInput}}" userInput="{{SimpleSalesRule.name}}" stepKey="filterByName"/>
         <click selector="{{AdminCartPriceRulesSection.searchButton}}" stepKey="doFilter"/>