nicer error when hitting recursion error while serializing

[samuelcolvin]

fix pydantic/pydantic#5348

[codspeed-hq]

CodSpeed Performance Report

Merging #630 recusion-error-serializing (425647b) will not alter performances.

Summary

🔥 0 improvements
❌ 0 regressions
✅ 120 untouched benchmarks

🆕 0 new benchmarks
⁉️ 0 dropped benchmarks

[codecov-commenter]

Codecov Report

Merging #630 (425647b) into main (c9a83c8) will increase coverage by 0.04%.
The diff coverage is 96.42%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #630      +/-   ##
==========================================
+ Coverage   94.02%   94.07%   +0.04%     
==========================================
  Files          98       98              
  Lines       13283    13282       -1     
  Branches       25       25              
==========================================
+ Hits        12490    12495       +5     
+ Misses        787      781       -6     
  Partials        6        6              

Impacted Files	Coverage Δ
src/serializers/type_serializers/function.rs	96.53% <96.00%> (+1.38%)	⬆️
src/serializers/errors.rs	87.75% <100.00%> (+2.97%)	⬆️

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