ACQE-8324: Using rest api update guest cart of configurable product

 - Added soap api functionality

Author: sandesh-shivakumar

dev/tests/api-functional/testsuite/Magento/Quote/Api/GuestCartConfigurableItemRepositoryTest.php

@@ -111,7 +111,12 @@ private function createGuestCart(): string
             'rest' => [
                 'resourcePath' => self::RESOURCE_PATH_GUEST_CART,
                 'httpMethod' => Request::HTTP_METHOD_POST
-            ]
+            ],
+            'soap' => [
+                'service' => self::SERVICE_NAME_GUEST_CART,
+                'serviceVersion' => self::SERVICE_VERSION_GUEST_CART,
+                'operation' => self::SERVICE_NAME_GUEST_CART . 'Save',
+            ],
         ];
 
         $requestData = ['storeId' => 1];
@@ -296,7 +301,12 @@ private function getCartServiceInfo(
             'rest' => [
                 'resourcePath' => $resourcePath,
                 'httpMethod' => $httpMethod
-            ]
+            ],
+            'soap' => [
+                'service' => self::SERVICE_NAME_GUEST_CART,
+                'serviceVersion' => self::SERVICE_VERSION_GUEST_CART,
+                'operation' => self::SERVICE_NAME_GUEST_CART . 'Save',
+            ],
         ];
     }
 }