Setting durable object jurisdiction should be a no-op in local env

When applying a jurisdiction for a durable object with:
`const euSubnamespace = env.MY_DURABLE_OBJECT.jurisdiction("eu");`
it does not work in local env and instead throws an error saying
```
Jurisdiction restrictions are not implemented in workerd.
```
I don't think anyone expects jurisdiction to take effect on the local machine.

Because of the error additional logic is needed to skip the jurisdiction setting when running locally, and this feels like an unnecessary complication.