gh-87512: Fix `subprocess` using `timeout=` on Windows blocking with a large `input=`#142058

gpshead merged 3 commits intopython:mainpython/cpython:mainfrom

gpshead:claude/fix-subprocess-windows-timeout-01YQBh24PZt4w9vhdqBQi6uWgpshead/cpython:claude/fix-subprocess-windows-timeout-01YQBh24PZt4w9vhdqBQi6uWCopy head branch name to clipboard