Add a shared Windows replace fallback helper

os.replace can fail on Windows even when the temp file and the
destination are in the same directory on the same drive: WinError
17, "cannot move to a different disk drive", maps to a plain OSError
in Python rather than PermissionError, so the existing copy then
delete fallback for WinError 5 and 32 never caught it. Adds
os_replace_with_fallback, checking both PermissionError and winerror
17, and points the shared atomic writer at it instead of its own
inline PermissionError only version. Toward #3508.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017qfdzgbA5KedGEjD1AayNh
(cherry picked from commit 32cbf1f83ef913725fa7eb309822990a96d7fd23)