Add slicing benchmarks for vortex-buffer

[AdamGS]

Summary

Adds a basic benchmark for slicing, including an Arrow baseline. Hopefully building up to #8322, but I want a baseline first.

[codspeed-hq]

Merging this PR will improve performance by 25.4%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 6 improved benchmarks
✅ 1517 untouched benchmarks
🆕 3 new benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	chunked_bool_canonical_into[(1000, 10)]	46.7 µs	31.8 µs	+46.95%
⚡	Simulation	bitwise_not_vortex_buffer_mut[128]	275.3 ns	216.9 ns	+26.89%
⚡	Simulation	chunked_varbinview_canonical_into[(1000, 10)]	197.9 µs	161.8 µs	+22.34%
⚡	Simulation	bitwise_not_vortex_buffer_mut[1024]	336.9 ns	278.6 ns	+20.94%
⚡	Simulation	chunked_varbinview_into_canonical[(1000, 10)]	213.6 µs	177.3 µs	+20.42%
⚡	Simulation	bitwise_not_vortex_buffer_mut[2048]	400.6 ns	342.2 ns	+17.05%
🆕	Simulation	slice_empty_vortex	N/A	2.7 µs	N/A
🆕	Simulation	slice_tight_loop_arrow[65536]	N/A	34.2 µs	N/A
🆕	Simulation	slice_tight_loop_vortex[65536]	N/A	58.9 µs	N/A

Tip

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_{Comparing adamg/buffer-slicing-bench (6a4e697) with develop (a038963)}