add EJSON import

Author: baileympearson

test/csfle-env.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { Binary } = require("bson");
+const { Binary, EJSON } = require("bson");
 
 // TODO(NODE-6685): use secrets manager variables
 // const csfleKMSProviders = {