Test IO file sizes in Rust and array sizes in Python doctests

[robert3005]

Python io doc tests check compressed size in bytes since that's what they're talking about. Keep the file size test as a rust test

[codspeed]

Merging this PR will improve performance by 10.74%

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⚠️ Different runtime environments detected

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⚡ 1 improved benchmark
✅ 2110 untouched benchmarks
⏩ 518 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	words_gather_dispatch_neon[65536]	2.3 µs	2 µs	+10.74%

Tip

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_{Comparing rk/python-io-doctest-size (9a58a45) with develop (f234bc6)}

Footnotes

1. 518 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[joseph-isaacs]

Can we move this into a rust test on the written file size. It really useful to know when we change file size

[robert3005]

Here you go, there's a rust test now, I kept the python change since this is useful for docs

addressed

[github-actions]

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