Use 127.0.0.1 instead of localhost

This resolves an error we were experiencing in the test

```
FetchError: request to http://localhost:6109/list failed, reason: connect ECONNREFUSED ::1:6109
```

Node.js used to favor IPv4 but that changed in v17

> It's #39987 -- Node.js now returns IP addresses in the order they are returned from the name resolver/DNS. There's a --dns-result-order command line option you can set to control the behaviour -- the difference in Node.js 17 is the default changed.

nodejs/node#40537 (comment)

Signed-off-by: Phillip Rak <rak.phillip@gmail.com>

e2e/credentials-server.e2e.spec.ts

@@ -284,7 +284,7 @@ describeWithCreds('Credentials server', () => {
   });
 
   test('should require authentication', async() => {
-    const url = `http://localhost:${ serverState.port }/list`;
+    const url = `http://127.0.0.1:${ serverState.port }/list`;
     const resp = await fetch(url);
 
     expect(resp.ok).toBeFalsy();