Account for kvikio python folder nesting

rapidsai/kvikio#369 moves the python wheel code one level deeper so that we add support for a dedicated libkvikio wheel. This adjustment needs to be accounted for here. Confused PR run without this change: https://github.com/rapidsai/kvikio/actions/runs/8900188332/job/24441209009#step:7:1446

features/src/rapids-build-utils/opt/rapids-build-utils/manifest.yaml

@@ -43,7 +43,7 @@ repos:
       depends: [rmm]
   python:
     - name: kvikio
-      sub_dir: python
+      sub_dir: python/kvikio
       depends: [KvikIO]
       args: {cmake: -DFIND_KVIKIO_CPP=ON}