[WIP] Re-shaping the canonical variant array to support more general …

[AdamGS]

No description provided.

[codspeed-hq]

Merging this PR will degrade performance by 21.65%

❌ 2 regressed benchmarks
✅ 1161 untouched benchmarks
⏩ 558 skipped benchmarks¹

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

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	varbinview_zip_block_mask	2.9 ms	3.7 ms	-21.65%
❌	Simulation	varbinview_zip_fragmented_mask	6.4 ms	7.1 ms	-10.5%

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_{Comparing adamg/variant-array (8a6a389) with develop (452a4a3)}

Footnotes

1. 558 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. ↩