Respect fork markers in --resolution-mode=lowest-direct (#8839)

## Summary

Previously, given:

```toml
dependencies = [
    "pycountry >= 22.1.10",
    "setuptools >= 50.0.0; python_version>='3.12'"
]
```

We'd solve for the lowest version of setuptools (with _no_ lower-bound
constraint) in the `python_version < '3.12'` complement.

Closes https://github.com/astral-sh/uv/issues/8819.

crates/uv-resolver/src/resolver/batch_prefetch.rs

@@ -122,7 +122,7 @@ impl BatchPrefetcher {
                     }
                 }
                 BatchPrefetchStrategy::InOrder { previous } => {
-                    let mut range = if selector.use_highest_version(name) {
+                    let mut range = if selector.use_highest_version(name, env) {
                         Range::strictly_lower_than(previous)
                     } else {
                         Range::strictly_higher_than(previous)