Support recursive extras (#1435)

## Summary

We had a guard in the resolve to avoid "self-dependencies" (as in
`gps3==0.33.3`), but this guard was _unintentionally_ filtering out
recursive extras.

Closes https://github.com/astral-sh/uv/issues/1342.

## Test Plan

Taken from https://github.com/astral-sh/uv/pull/1352.

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

@@ -861,8 +861,8 @@ impl<'a, Provider: ResolverProvider> Resolver<'a, Provider> {
                     &metadata.requires_dist,
                     &self.constraints,
                     &self.overrides,
-                    extra.as_ref(),
                     Some(package_name),
+                    extra.as_ref(),
                     self.markers,
                 )?;