GraphQL: Optimize queries, fixes some null returns (on object), fix stitched GraphQLUpload (#6709)

* Optimize query, fixes some null returns, fix stitched GraphQLUpload

* Fix authData key selection

* Prefer Iso string since other GraphQL solutions use this format

* fix tests

Co-authored-by: Antonio Davi Macedo Coelho de Castro <adavimacedo@gmail.com>

src/Config.js

@@ -114,7 +114,9 @@ export class Config {
   }
 
   static validateIdempotencyOptions(idempotencyOptions) {
-    if (!idempotencyOptions) { return; }
+    if (!idempotencyOptions) {
+      return;
+    }
     if (idempotencyOptions.ttl === undefined) {
       idempotencyOptions.ttl = IdempotencyOptions.ttl.default;
     } else if (!isNaN(idempotencyOptions.ttl) && idempotencyOptions.ttl <= 0) {