Fix serialization inference for complex types in python

[sydney-runkle]

Fix pydantic/pydantic#10926

Slightly changes behavior introduced in #1524

Inference now aligns with complex serialization by producing a complex value when dumping to Python.

[codspeed-hq]

CodSpeed Performance Report

Merging #1549 will not alter performance

_{Comparing infer-complex-ser (a51f2e9) with main (1e5e899)}

Summary

✅ 155 untouched benchmarks