split: stream data using copy to not overwhelm memory with large files

[ChrisDryden]

This should solve the issue: #10250 where for large files split can run out of memory. I was able to use the built in integration test support to limit the resources that the test has to mock a scenario where the file is larger than the available memory to trigger the conditions for the bug.

[codspeed-hq]

Merging this PR will degrade performance by 20.58%

❌ 1 regressed benchmark
✅ 140 untouched benchmarks
⏩ 38 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	split_number_chunks	289.5 µs	364.5 µs	-20.58%

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_{Comparing ChrisDryden:fix-split-number-memory-issue (da74374) with main (f7b5f8f)²}

Footnotes

1. 38 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. ↩

2. No successful run was found on main (450e7cf) during the generation of this report, so f7b5f8f was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩