[CHORE]: better subquery handling

[universalmind303]

this better defers the errors to the optimizer instead of immediately erroring out on subqueries.

[codspeed-hq]

CodSpeed Performance Report

Merging #3295 will degrade performances by 56.18%

_{Comparing universalmind303:subquery-fix-2 (1896257) with main (711e862)}

Summary

❌ 2 regressions
✅ 15 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	main	universalmind303:subquery-fix-2	Change
❌	test_iter_rows_first_row[100 Small Files]	269 ms	373.8 ms	-28.03%
❌	test_show[100 Small Files]	22.3 ms	50.8 ms	-56.18%

[kevinzwang]

LGTM