New compute-changes.py should be checked with mypy #129707
Description
Feature or enhancement
Right now we have a special mypy.ini in Tools/build:
Line 2 in cdcacec
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.