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This upgrades the version of the Arrow C++ library to 13.0.0.
The notable changes in this version are:
Comparing benchmark results between the current master and this branch, the timings are mostly the same, with some of the "chunked" writing tests slowing down a little (5 to 10%) indicating there might be a bit more per-row-group overhead. There is quite a large slowdown in the nested write test though, going from 47 ms to 85 ms per iteration on my machine. I looked into this and have made a PR to fix this in Arrow (apache/arrow#37454), so hopefully the performance will be better again for the next version. I think this regression probably isn't bad enough to block upgrading to 13.0.0 though as it looks like it should only affect writing nested data, where we make lots of calls to WriteBatch with small batches of data. (And possibly this could be refactored to avoid needing to make so many WriteBatch calls if we buffered these first?)