Add subgroups to devops adoption

This was previously removed, but is  now
being re-instated again.

ee/app/assets/javascripts/admin/dev_ops_report/graphql.js

@@ -13,7 +13,6 @@ export const resolvers = {
       const params = {
         per_page: Api.DEFAULT_PER_PAGE,
         search,
-        top_level_only: true,
       };
       if (nextPage) {
         params.page = nextPage;

ee/spec/frontend/admin/dev_ops_report/graphql/resolvers_spec.js

@@ -23,11 +23,11 @@ describe('DevOps GraphQL resolvers', () => {
   });
 
   describe('groups query', () => {
-    it('only fetches top level groups', async () => {
+    it('fetches all groups', async () => {
       mockAdapter.onGet(fetchGroupsUrl).reply(httpStatus.OK, groupData, pageData);
       await mockClient.query({ query: getGroupsQuery });
 
-      expect(mockAdapter.history.get[0].params).toEqual(
+      expect(mockAdapter.history.get[0].params).not.toEqual(
         expect.objectContaining({ top_level_only: true }),
       );
     });