Replace deprecated cupy.sparse with cupyx.scipy.sparse (#4381)

Authors:
  - Matthew Roeschke (https://github.com/mroeschke)

Approvers:
  - Rick Ratzel (https://github.com/rlratzel)

URL: #4381

Author: mroeschke

python/cugraph/cugraph/tests/generators/test_rmat.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023, NVIDIA CORPORATION.
+# Copyright (c) 2021-2024, NVIDIA CORPORATION.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -17,7 +17,7 @@
 import cudf
 import cugraph
 from cugraph.generators import rmat
-from cupy.sparse import coo_matrix, triu, tril
+from cupyx.scipy.sparse import coo_matrix, triu, tril
 import numpy as np
 import cupy as cp