Triangle Counts C++ API

[seunghwak]

Define C++ API for triangle counting.

[codecov-commenter]

Codecov Report

Merging #2233 (81339d4) into branch-22.06 (38be932) will increase coverage by 0.36%.
The diff coverage is n/a.

❗ Current head 81339d4 differs from pull request most recent head e7bfa81. Consider uploading reports for the commit e7bfa81 to get more accurate results

@@               Coverage Diff                @@
##           branch-22.06    #2233      +/-   ##
================================================
+ Coverage         70.82%   71.18%   +0.36%     
================================================
  Files               170      170              
  Lines             11036    11078      +42     
================================================
+ Hits               7816     7886      +70     
+ Misses             3220     3192      -28     

Impacted Files	Coverage Δ
python/cugraph/cugraph/gnn/graph_store.py	82.60% <ø> (+11.77%)	⬆️
python/cugraph/cugraph/structure/hypergraph.py	90.00% <ø> (ø)
python/cugraph/cugraph/tests/dask/test_mg_bfs.py	0.00% <ø> (ø)
python/cugraph/cugraph/tests/dask/test_mg_comms.py	0.00% <ø> (ø)
...cugraph/cugraph/tests/dask/test_mg_connectivity.py	0.00% <ø> (ø)
...ython/cugraph/cugraph/tests/dask/test_mg_degree.py	0.00% <ø> (ø)
python/cugraph/cugraph/tests/dask/test_mg_hits.py	0.00% <ø> (ø)
...thon/cugraph/cugraph/tests/dask/test_mg_louvain.py	0.00% <ø> (ø)
...hon/cugraph/cugraph/tests/dask/test_mg_pagerank.py	0.00% <ø> (ø)
python/cugraph/cugraph/tests/dask/test_mg_sssp.py	0.00% <ø> (ø)
... and 17 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a6dc6b7...e7bfa81. Read the comment docs.

[BradReesWork]

@gpucibot merge