[issue34838] Improve arg clinic code generation for cases with type checking

[Ammar Askar]

Ammar Askar <ammar at ammaraskar.com> added the comment:

Great job Serhiy, your work on argument clinic has encompassed the previous PR very well. I've updated it for the changes.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34838>
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