[issue20152] Derby #15: Convert 50 sites to Argument Clinic across 9 files

[Brett Cannon]

Brett Cannon added the comment:

To make it easier to track what is left to commit:

* grp
* spwd
* fcntl
* pyexpat
* array
* cmath [Martin says this no longer applies cleanly]

I should also mention all of these patches probably need to shift to `output preset file` as well.

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stage: needs patch -> commit review

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