Enable extra build dependencies to 'match runtime' versions (#15036)

## Summary

This is an alternative to https://github.com/astral-sh/uv/pull/14944
that functions a little differently. Rather than adding separate
strategies, you can instead say:

```toml
[tool.uv.extra-build-dependencies]
child = [{ requirement = "anyio", match-runtime = true }]
```

Which will then enforce that `anyio` uses the same version as in the
lockfile.

crates/uv-scripts/src/lib.rs

@@ -16,7 +16,7 @@ use uv_pypi_types::VerbatimParsedUrl;
 use uv_redacted::DisplaySafeUrl;
 use uv_settings::{GlobalOptions, ResolverInstallerOptions};
 use uv_warnings::warn_user;
-use uv_workspace::pyproject::Sources;
+use uv_workspace::pyproject::{ExtraBuildDependency, Sources};
 
 static FINDER: LazyLock<Finder> = LazyLock::new(|| Finder::new(b"# /// script"));
 
@@ -428,8 +428,7 @@ pub struct ToolUv {
     pub override_dependencies: Option<Vec<uv_pep508::Requirement<VerbatimParsedUrl>>>,
     pub constraint_dependencies: Option<Vec<uv_pep508::Requirement<VerbatimParsedUrl>>>,
     pub build_constraint_dependencies: Option<Vec<uv_pep508::Requirement<VerbatimParsedUrl>>>,
-    pub extra_build_dependencies:
-        Option<BTreeMap<PackageName, Vec<uv_pep508::Requirement<VerbatimParsedUrl>>>>,
+    pub extra_build_dependencies: Option<BTreeMap<PackageName, Vec<ExtraBuildDependency>>>,
     pub sources: Option<BTreeMap<PackageName, Sources>>,
 }