Remove Stage name check on aggregate pipelines (#7237)

* add search for atlas search index

* added test for search in pipeline

* removed stage name check in pipeline

* removed spec for invalid query invalid key

* updated changelog

Co-authored-by: Diamond Lewis <findlewis@gmail.com>

spec/AggregateRouter.spec.js

@@ -74,4 +74,15 @@ describe('AggregateRouter', () => {
       expect(e.message).toBe('Pipeline stages should only have one key found group, match');
     }
   });
+
+  it('get search pipeline from Pipeline Operator (Array)', () => {
+    const body = {
+      pipeline: {
+        search: {},
+      },
+    };
+    const expected = [{ $search: {} }];
+    const result = AggregateRouter.getPipeline(body);
+    expect(result).toEqual(expected);
+  });
 });

spec/ParseQuery.Aggregate.spec.js

@@ -83,18 +83,6 @@ describe('Parse.Query Aggregate testing', () => {
     );
   });
 
-  it('invalid query invalid key', done => {
-    const options = Object.assign({}, masterKeyOptions, {
-      body: {
-        unknown: {},
-      },
-    });
-    get(Parse.serverURL + '/aggregate/TestObject', options).catch(error => {
-      expect(error.error.code).toEqual(Parse.Error.INVALID_QUERY);
-      done();
-    });
-  });
-
   it('invalid query group _id', done => {
     const options = Object.assign({}, masterKeyOptions, {
       body: {