Retry streaming downloads on broken pipe errors (#13281)

Educated guess at #12359

See
https://github.com/hyperium/h2/blob/adab70fd9f9e5ce3099d274a4b548a27bfdee4dc/src/proto/streams/state.rs#L309-L310
for the error source.

crates/uv-client/src/base_client.rs

@@ -497,6 +497,7 @@ pub fn is_extended_transient_error(err: &dyn Error) -> bool {
     for io_err in find_sources::<io::Error>(&err) {
         if io_err.kind() == io::ErrorKind::ConnectionReset
             || io_err.kind() == io::ErrorKind::UnexpectedEof
+            || io_err.kind() == io::ErrorKind::BrokenPipe
         {
             trace!("Retrying error: `ConnectionReset` or `UnexpectedEof`");
             return true;

crates/uv-client/src/cached_client.rs

@@ -623,8 +623,7 @@ impl CachedClient {
                 .await;
             if result
                 .as_ref()
-                .err()
-                .is_some_and(|err| is_extended_transient_error(err))
+                .is_err_and(|err| is_extended_transient_error(err))
             {
                 let retry_decision = retry_policy.should_retry(start_time, n_past_retries);
                 if let reqwest_retry::RetryDecision::Retry { execute_after } = retry_decision {