Make ExecutionArgs a dyn trait

[gatesn]

This allows implementations to short-circuit, and supports the next change where ExecutionArgs::get will return a Columnar value.

[codspeed-hq]

Merging this PR will improve performance by 18.36%

⚡ 1 improved benchmark
✅ 953 untouched benchmarks
⏩ 1466 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	chunked_opt_bool_canonical_into[(10, 1000)]	1.6 ms	1.4 ms	+18.36%

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_{Comparing ngates/execution-args (759beef) with develop (0abfb33)}

Footnotes

1. 1466 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. ↩