Prevent auto-restart of language servers after Stop All Servers (#51468)

Release Notes:

- When stopping all language servers, Zed will now no longer restart
language servers when language files change until the user restarts all
language servers explicitly
e77b18bad8Lukas Wirth committed on 6/5/2026, 10:36:03 AM· committed by GitHubparenta85f8ad
7 files changedLine totals unavailable