added enbale flat rate code in failed test case for my PR Build failure

Author: shashikant.kumar

app/code/Magento/Checkout/Test/Mftf/Test/VerifyStateOptionApplicableForCheckoutFlowTest.xml

@@ -26,7 +26,7 @@
             <createData entity="SimpleProduct" stepKey="createProduct">
                 <requiredEntity createDataKey="createCategory"/>
             </createData>
-
+            <magentoCLI command="config:set {{EnableFlatRateConfigData.path}} {{EnableFlatRateConfigData.value}}" stepKey="enableFlatRate"/>
             <!--Unselect France from State is Required for listing & allow to choose State if it is optional for Country-->
             <actionGroup ref="SelectCountriesWithRequiredRegionActionGroup" stepKey="setCustomCountryWithRequiredRegion">
                 <argument name="countries" value="CustomCountryWithRequiredRegion"/>