TurboQuant: Add distortion benchmark

[connortsui20]

Summary

Tracking issue: #7830

Adds distortion / error benchmarking option for TurboQuant. Note that this benchmark is still over the old implementation of TurboQuant, but because the algorithm is identical it shouldn't affect any numbers.

We will cut over to the new version atomically once everything is implemented in vortex-turboquant.

Testing

N/A

[codspeed-hq]

Merging this PR will improve performance by 17.88%

⚠️ 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.

⚡ 1 improved benchmark
✅ 1250 untouched benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	cuda/bitpacked_u8/unpack/3bw[100M]	353 µs	299.4 µs	+17.88%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing ct/tq-error (2095616) with develop (495f30e)}

[connortsui20]

whoops forgot to make sure the binary is always up to date (edit: fixed)