New `compute-changes.py` should be checked with mypy

[sobolevn]

Feature or enhancement

Right now we have a special mypy.ini in Tools/build:

cpython/Tools/build/mypy.ini

Line 2 in cdcacec

files = Tools/build/generate_sbom.py

But, it only checks one file. Since newly added https://github.com/python/cpython/blob/main/Tools/build/compute-changes.py is fully annotated, it should be included as well.

Refs #129627

I will send a PR.

Linked PRs

• gh-129707: Check Tools/build/compute-changes.py with mypy #129708