fix(auth-server): fix incorrect response validation on subscription upgrade route

fixes #5414

packages/fxa-auth-server/lib/routes/subscriptions.js

@@ -1159,7 +1159,7 @@ const directRoutes = (
         response: {
           schema: isA
             .array()
-            .items(validators.subscriptionsSubscriptionValidator),
+            .items(validators.subscriptionsSubscriptionSupportValidator),
         },
         validate: {
           query: {
@@ -1180,11 +1180,6 @@ const directRoutes = (
           payload: false,
           strategy: 'oauthToken',
         },
-        response: {
-          schema: isA
-            .array()
-            .items(validators.subscriptionsSubscriptionSupportValidator),
-        },
         validate: {
           params: {
             subscriptionId: validators.subscriptionsSubscriptionId.required(),