Fix bug discovered in Jaccard testing #3758
Merged
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A customer identified an issue trying to run Jaccard. In MG calls they were seeing failed memory allocation calls.
While computing get_two_hop_neighbors, vertices were being shuffled incorrectly in the C API, so we were getting vertices processed on the wrong GPU, resulting in out-of-bounds memory references.
Moved the shuffle before renumbering, which puts vertices to be on proper GPU
Closes #3746