Remove usage of RAFT memory management

[viclafargue]

Completes rapidsai/raft#400

[codecov-commenter]

Codecov Report

Merging #2076 (3197d81) into branch-22.04 (18ac2c2) will increase coverage by 0.08%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-22.04    #2076      +/-   ##
================================================
+ Coverage         73.51%   73.59%   +0.08%     
================================================
  Files               156      156              
  Lines             10295    10312      +17     
================================================
+ Hits               7568     7589      +21     
+ Misses             2727     2723       -4     

Impacted Files	Coverage Δ
python/cugraph/cugraph/structure/property_graph.py	96.42% <0.00%> (-0.20%)	⬇️
...ython/cugraph/cugraph/tests/test_property_graph.py	96.09% <0.00%> (+0.04%)	⬆️
.../cugraph/tests/test_edge_betweenness_centrality.py	84.93% <0.00%> (+0.60%)	⬆️
...graph/cugraph/tests/test_betweenness_centrality.py	83.01% <0.00%> (+0.62%)	⬆️
python/cugraph/cugraph/tests/test_graph_store.py	100.00% <0.00%> (+1.56%)	⬆️
python/cugraph/cugraph/tests/test_utils.py	75.55% <0.00%> (+4.44%)	⬆️

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[ChuckHastings]

Thanks @viclafargue !

[ChuckHastings]

@gpucibot merge