[3.14] gh-133403: Check `Tools/build/verify_ensurepip_wheels.py` with mypy (GH-133453) (#133689)

gh-133403: Check `Tools/build/verify_ensurepip_wheels.py` with mypy (GH-133453)
(cherry picked from commit 5f3d3f2a6c8ddf7a6be340c3f4c696e2a5eb51f0)

Co-authored-by: Flosckow <66554425+Flosckow@users.noreply.github.com>
Co-authored-by: Daniil Dumchenko <dumchenko.de@sibvaleo.com>
Co-authored-by: sobolevn <mail@sobolevn.me>