Disable bulkdelete for users point to old mongo proxy (#1964)

* Disable bulk delete if old mongo proxy

* Bug fix

* Fix unit tests

* Fix formatting

src/Explorer/Tabs/DocumentsTabV2/DocumentsTabV2Mongo.test.tsx

@@ -50,6 +50,7 @@ jest.mock("Common/MongoProxyClient", () => ({
     }),
   ),
   deleteDocuments: jest.fn(() => Promise.resolve()),
+  useMongoProxyEndpoint: jest.fn(() => true),
 }));
 
 jest.mock("Explorer/Controls/Editor/EditorReact", () => ({