Relax type specification for __validators__ values in create_model

[sydney-runkle]

Fix #9690

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[codspeed-hq]

CodSpeed Performance Report

Merging #9697 will not alter performance

_{Comparing create_model_typing_fix (edefa6a) with main (668c728)}

Summary

✅ 13 untouched benchmarks

[dmontagu]

LGTM but @adriangb I'd be curious if you have any objections/alternative suggestions for resolving #9690 given your familiarity with the typing of validators/etc.

I suggested this approach to @sydney-runkle given I think getting specific typing here is not very necessary given how exotic/advanced this usage of create_model is, but I'd be open to narrower type hints if they were robust to different type checkers and all the things we actually currently support. (And if you think it is even worth being more specific than Callable[..., Any].)

[sydney-runkle]

Thanks @dmontagu @adriangb!