Revert "Derive optimized ScanPlanV2s from source plans"

[joseph-isaacs]

Reverts #9005

[codspeed-hq]

Merging this PR will degrade performance by 11.23%

❌ 1 regressed benchmark
✅ 1841 untouched benchmarks
⏩ 55 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	decompress[u64, (10000, 256)]	55 µs	61.9 µs	-11.23%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing revert-9005-ji/planning-old-execute (b73c315) with develop (5e3ece3)²}

Footnotes

1. 55 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 develop (a1c2853) during the generation of this report, so 5e3ece3 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩