Respect UV_PYTHON_DOWNLOAD_MIRROR in uv python list

Author: zanieb

crates/uv-python/src/downloads.rs

@@ -1296,7 +1296,7 @@ impl ManagedPythonDownload {
 
     /// Return the [`Url`] to use when downloading the distribution. If a mirror is set via the
     /// appropriate environment variable, use it instead.
-    fn download_url(
+    pub fn download_url(
         &self,
         python_install_mirror: Option<&str>,
         pypy_install_mirror: Option<&str>,

crates/uv/src/commands/python/list.rs

@@ -117,7 +117,7 @@ pub(crate) async fn list(
             output.insert((
                 download.key().clone(),
                 Kind::Download,
-                Either::Right(download.url()),
+                Either::Right(download.download_url()),
             ));
         }
     }