provide required moduleItem gql type

refs LS-3017
flag=none

test plan:
  - tests pass

qa risk: low

Change-Id: Ib823b0533e6126346adc14c76a2880eaff01f96a
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/286070
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Omar Soto-Fortuño <omar.soto@instructure.com>
QA-Review: Omar Soto-Fortuño <omar.soto@instructure.com>
Product-Review: Omar Soto-Fortuño <omar.soto@instructure.com>

jest/jest-setup.js

@@ -98,7 +98,6 @@ const ignoredWarnings = [
   /Error getting \/media_objects\/dummy_media_id\/info/,
   /Exactly one focusable child is required/,
   /Missing field errors in/,
-  /Missing field moduleItem in/,
   /Please update the following components: %s/,
   /shared_brand_configs.* not called/,
   /Translation for .* is missing/,

ui/features/assignments_show_student/react/components/__tests__/SubmissionManager.test.js

@@ -375,7 +375,8 @@ describe('SubmissionManager', () => {
       const successfulResponse = {
         data: {
           setModuleItemCompletion: {
-            __typename: ''
+            __typename: '',
+            moduleItem: null
           }
         },
         errors: null