[3.9] bpo-41686: Always create the SIGINT event on Windows (GH-23344) by vstinner · Pull Request #23347 · python/cpython

…3347) (GH-23349)

bpo-41686, bpo-41713: On Windows, the SIGINT event,
_PyOS_SigintEvent(), is now created even if Python is configured to
not install signal handlers (PyConfig.install_signal_handlers=0 or
Py_InitializeEx(0)).

(cherry picked from commit 05a5d69)