Normalize CRLF line breaks in completion labels too (#63920)

Part of
https://github.com/zed-industries/zed/issues/63273#issuecomment-5562451827



https://github.com/user-attachments/assets/ecaa1bd0-672b-4323-a67e-e1a7e3c428fb


Release Notes:

- Fixed CRLF line breaks not normalized in completion labels
52b2927a1bKirill Bulatov committed on 9/9/2026, 3:23:30 PM· committed by GitHubparenta3e93ff
2 files changedLine totals unavailable