points2volumes benchmark run alone

Summary: Enable this benchmark to be run on its own, like others.

Reviewed By: patricklabatut

Differential Revision: D29522846

fbshipit-source-id: c7b3b5c9a0fcdeeb79d8b2ec197684b4380aa547

tests/bm_points_to_volumes.py

@@ -26,3 +26,7 @@ def bm_points_to_volumes() -> None:
         kwargs_list,
         warmup_iters=1,
     )
+
+
+if __name__ == "__main__":
+    bm_points_to_volumes()