Closes [#45631](https://github.com/zed-industries/zed/issues/45631)

Recording:


https://github.com/user-attachments/assets/a5143eb4-fae3-42a7-9d64-fb7c42ee97c2


Release Notes:

- copilot: Edit predictions now work in temporary files

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Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>