test(NODE-7183): migrate integration/gridfs tests (#4677)

Co-authored-by: Durran Jordan <durran@gmail.com>

Author: tadjik1

test/integration/gridfs/gridfs.test.ts

@@ -1,13 +1,14 @@
+import { once } from 'node:events';
+
 import { expect } from 'chai';
-import { once } from 'events';
 
 import {
   type CommandStartedEvent,
   type Db,
   GridFSBucket,
   type MongoClient,
   ObjectId
-} from '../../mongodb';
+} from '../../../src';
 import { sleep } from '../../tools/utils';
 
 describe('GridFS', () => {