chore(curriculum): fix + test curriculum order (#44366)

* chore(tools): test curriculum order

* chore: update orders

* fix(tests): temporarily ignore cert super

The Relational Databases cert being 'upcomingChanges' is breaking
the tests.

* fix: graphql query here

* fix: use only one meta

* chore: remove unnecessary superOrders

* chore: zero-based indexing

* fix: update mock

* refactor: remove unused fixture

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

curriculum/challenges/_meta/json-apis-and-ajax/meta.json

@@ -2,7 +2,7 @@
   "name": "JSON APIs and AJAX",
   "isUpcomingChange": false,
   "dashedName": "json-apis-and-ajax",
-  "order": 2,
+  "order": 1,
   "time": "2 hours",
   "template": "",
   "required": [
@@ -11,7 +11,7 @@
     }
   ],
   "superBlock": "data-visualization",
-  "superOrder": 4,
+  "superOrder": 3,
   "challengeOrder": [
     [
       "587d7fad367417b2b2512be1",