add libcugraph Python builds (#435)

Contributes to rapidsai/build-planning#33

Adjusts `rapids-build-utils` manifest for release 25.02 to account for
the introduction of new `libcugraph` wheels
(rapidsai/cugraph#4804).

## Notes for Reviewers

This shouldn't be merged still pointing at my forks. Plan:

1. admin-merge rapidsai/cugraph#4804 once
everything except devcontainers CI there is passing
2. point this PR at upstream `rapidsai/cugraph`
3. observe CI passing and merge this normally (or admin-merge to save
time)

---------

Co-authored-by: Bradley Dice <[email protected]>
Co-authored-by: Paul Taylor <[email protected]>

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

@@ -174,14 +174,18 @@ repos:
       depends: [cudf, cugraph]
       args: {install: *rapids_build_backend_args}
   python:
+    - name: libcugraph
+      sub_dir: python/libcugraph
+      depends: [cugraph]
+      args: {install: *rapids_build_backend_args}
     - name: pylibcugraph
       sub_dir: python/pylibcugraph
       depends: [cugraph]
-      args: {cmake: -DFIND_CUGRAPH_CPP=ON, install: *rapids_build_backend_args}
+      args: {install: *rapids_build_backend_args}
     - name: cugraph
       sub_dir: python/cugraph
       depends: [cugraph]
-      args: {cmake: -DFIND_CUGRAPH_CPP=ON, install: *rapids_build_backend_args}
+      args: {install: *rapids_build_backend_args}
     - name: cugraph-service-client
       sub_dir: python/cugraph-service/client
       args: {install: *rapids_build_backend_args}