always use a Python iterator for sets and frozensets #3849

Performance Regression: -15.63%

⚡ 1 improvements
❌ 3 regressions
✅ 75 untouched benchmarks

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

	Benchmark	`main`	`davidhewitt:set-iteration`	Change
❌	`mapping_from_dict`	300 ns	355.6 ns	-15.63%
⚡	`f64_from_pyobject`	516.7 ns	461.1 ns	+12.05%
❌	`sequence_from_list`	300 ns	355.6 ns	-15.63%
❌	`sequence_from_tuple`	232.8 ns	260.6 ns	-10.66%