ACQE-5692: fixed flaky test found in isolated run.

Author: jilu1

app/code/Magento/Catalog/Test/Mftf/ActionGroup/StorefrontAssertCategoryNameIsShownInMenuActionGroup.xml

@@ -16,7 +16,7 @@
             <argument name="categoryName" type="string"/>
         </arguments>
 
-        <waitForElementVisible selector="{{StorefrontHeaderSection.NavigationCategoryByName(categoryName)}}" stepKey="waitForCatName" time="90"/>
+        <waitForElementVisible selector="{{StorefrontHeaderSection.NavigationCategoryByName(categoryName)}}" stepKey="waitForCatName" time="120"/>
         <seeElement selector="{{StorefrontHeaderSection.NavigationCategoryByName(categoryName)}}"
                     stepKey="seeCatergoryInStoreFront"/>
     </actionGroup>

app/code/Magento/Catalog/Test/Mftf/Test/StorefrontCategorySidebarMobileMenuTest.xml

@@ -42,6 +42,7 @@
         <click selector="{{StorefrontHeaderSection.mobileMenuToggle}}" stepKey="openSideMenu"/>
         <waitForElementClickable selector="{{StorefrontHeaderSection.NavigationCategoryByName($$createParentCategory.name$$)}}" stepKey="waitForCategoryMenuClickable" />
         <click selector="{{StorefrontHeaderSection.NavigationCategoryByName($$createParentCategory.name$$)}}" stepKey="expandCategoryMenu"/>
+        <waitForPageLoad stepKey="waitForSearchResult" time="60"/>
 
         <!-- Assert the category expanded successfully -->
         <actionGroup ref="StorefrontAssertCategoryNameIsShownInMenuActionGroup" stepKey="verifySubCatMenuItemIsVisibleInTheSidebar">