node_tests: Move to web/tests.

This lets us simplify the long-ish ‘../../static/js’ paths, and will
remove the need for the ‘zrequire’ wrapper.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

tools/node_lib/dump_fixtures.js

@@ -1,5 +1,5 @@
 "use strict";
 
-const events = require("../../frontend_tests/node_tests/lib/events");
+const events = require("../../web/tests/lib/events");
 
 console.info(JSON.stringify(events.fixtures, null, 4));