gh-137586: Replace 'osascript' with 'open' on macOS in webbrowser (#146439)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
7 files changed