Support Hashable for json validation

[sydney-runkle]

Alternative to #10005 based on #10005 (comment)

Fix #9567

Thanks @kc0506 for the test inspo!

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[codspeed-hq]

CodSpeed Performance Report

Merging #10324 will not alter performance

_{Comparing hashable-json (418ca00) with main (852736c)}

Summary

✅ 50 untouched benchmarks

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[dmontagu]

I think you should add a test for the cases that fail validation from JSON (presumably nested JSON objects/arrays would?). I vaguely recall seeing a version where it would convert arrays to tuples and objects to frozendict; I think we should keep the behavior like this and not do that, but I think it's worth adding a test with a note indicating that it was added to document the current behavior.

Other than that, LGTM