MC-42938: Add reCaptcha support to giftcard

* Modified code to capture additional headers

Author: nvshivakumar

dev/tests/api-functional/framework/Magento/TestFramework/TestCase/Webapi/Adapter/Rest.php

@@ -79,6 +79,7 @@ public function call($serviceInfo, $arguments = [], $storeCode = null, $integrat
         // we're always using JSON
         $authHeader = [];
         $restServiceInfo = $serviceInfo['rest'];
+        $additionalHeaders = $restServiceInfo['headers'] ?? [];
         if (array_key_exists('token', $restServiceInfo)) {
             $authHeader = $oAuthClient->buildBearerTokenAuthorizationHeader($restServiceInfo['token']);
         } else {
@@ -90,7 +91,12 @@ public function call($serviceInfo, $arguments = [], $storeCode = null, $integrat
                 $httpMethod
             );
         }
-        $authHeader = array_merge($authHeader, ['Accept: application/json', 'Content-Type: application/json']);
+        $authHeader = array_merge(
+            $authHeader,
+            ['Accept: application/json', 'Content-Type: application/json'],
+            $additionalHeaders
+        );
+
         switch ($httpMethod) {
             case Request::HTTP_METHOD_GET:
                 $response = $this->restClient->get($resourcePath, [], $authHeader);