fix(snix/build): use try_into_name_and_node()

The BuildRequest trait currently still uses the proto Build struct
as a response type, and that one uses nodes with names, causing
.try_into_anonymous_node() to panic.

Use try_into_name_and_node(), and discard the name for now. We should
update the trait to use a stricter type for this.

Change-Id: Ib183a163e885443c58c42808e464d0611eaae324
Reviewed-on: https://cl.snix.dev/c/snix/+/30169
Reviewed-by: Vova Kryachko <v.kryachko@gmail.com>
Tested-by: besadii
Autosubmit: Florian Klink <flokli@flokli.de>

snix/glue/src/snix_store_io.rs

@@ -291,9 +291,9 @@ impl SnixStoreIO {
                             .zip(build_result.outputs_needles.iter())
                             .zip(drv.outputs.iter())
                         {
-                            let output_node = output
+                            let (_, output_node) = output
                                 .clone()
-                                .try_into_anonymous_node()
+                                .try_into_name_and_node()
                                 .expect("invalid node");
 
                             let output_needles: Vec<_> = output_needles