[3.13] gh-131507: Add a way to recreate the `Misc/mypy` symlinks if missing (GH-132274) (#132293)

They will be removed in source tarballs so they don't appear in the SBOM.

(cherry picked from commit 16dcb576f7623e19f22be631bbc0e565335da969)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>