Durable Objects: fetch cf.resolveOverride not respected

Consider the following code:

```ts
fetch('https://external.foo.com', {
cf: {
resolveOverride: 'bar.com',
},
});
```

I'm observing that when this called from within a Worker, it works as expected - the request hits `bar.com` but the host on origin see's `external.foo.com`.

When the code executes within a Durable Object the `resolveOverride` is not respected, and the request is sent to `external.foo.com`. I've observed this behaviour from a DO method & alarm call.