ACQE-6611: AdminCheckZeroSubtotalOrderIsInProcessingStatusTest

added wait for click event

Author: nikhilsharma-adobe

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

@@ -14,6 +14,7 @@
         </arguments>
         <conditionalClick selector="{{DiscountSection.DiscountTab}}" dependentSelector="{{DiscountSection.CouponInput}}" visible="false" stepKey="clickToAddDiscount"/>
         <fillField selector="{{DiscountSection.DiscountInput}}" userInput="{{discountCode}}" stepKey="fillFieldDiscountCode"/>
+        <waitForElementClickable selector="{{DiscountSection.ApplyCodeBtn}}" stepKey="waitForClickToApplyDiscount"/>
         <click selector="{{DiscountSection.ApplyCodeBtn}}" stepKey="clickToApplyDiscount"/>
         <waitForText selector="{{DiscountSection.DiscountVerificationMsg}}" userInput="Your coupon was successfully applied" stepKey="waitForDiscountToBeAdded"/>
         <see selector="{{DiscountSection.DiscountVerificationMsg}}" userInput="Your coupon was successfully applied" stepKey="assertDiscountApplyMessage"/>