[3.14] gh-135099: Only wait on `_PyOS_SigintEvent()` in main thread (GH-135100)#135116

colesbury merged 1 commit intopython:3.14python/cpython:3.14from

miss-islington:backport-cc581f3-3.14miss-islington/cpython:backport-cc581f3-3.14Copy head branch name to clipboard