Update all rmm imports to use pylibrmm/librmm (#4671)

This PR updates all the RMM imports to use pylibrmm/librmm now that `rmm._lib` is deprecated . It should be merged after [rmm/1676](rapidsai/rmm#1676).

Authors:
  - Matthew Murray (https://github.com/Matt711)

Approvers:
  - Brad Rees (https://github.com/BradReesWork)
  - Alex Barghi (https://github.com/alexbarghi-nv)

URL: #4671

python/cugraph/cugraph/structure/graph_primtypes.pxd

@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2023, NVIDIA CORPORATION.
+# Copyright (c) 2019-2024, 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
@@ -21,7 +21,7 @@ from libcpp.memory cimport unique_ptr
 from libcpp.utility cimport pair
 from libcpp.vector cimport vector
 from pylibraft.common.handle cimport *
-from rmm._lib.device_buffer cimport device_buffer
+from rmm.librmm.device_buffer cimport device_buffer
 
 cdef extern from "cugraph/legacy/graph.hpp" namespace "cugraph::legacy":
 

python/cugraph/cugraph/structure/graph_primtypes.pyx

@@ -1,4 +1,4 @@
-# Copyright (c) 2020-2023, NVIDIA CORPORATION.
+# Copyright (c) 2020-2024, 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
@@ -20,7 +20,7 @@ import numpy as np
 from libc.stdint cimport uintptr_t
 from libcpp.utility cimport move
 
-from rmm._lib.device_buffer cimport DeviceBuffer
+from rmm.pylibrmm.device_buffer cimport DeviceBuffer
 from cudf.core.buffer import as_buffer
 import cudf
 

python/cugraph/cugraph/structure/graph_utilities.pxd

@@ -21,7 +21,7 @@ from libcpp.memory cimport unique_ptr
 from libcpp.utility cimport pair
 from libcpp.vector cimport vector
 
-from rmm._lib.device_buffer cimport device_buffer
+from rmm.librmm.device_buffer cimport device_buffer
 
 from pylibraft.common.handle cimport handle_t