agent: Cleanup edit_file evals (#55750)

- Rename `streaming_edit_file` to `edit_file`
- Remove workaround for replacing old edit tool with streaming edit file
tool

Release Notes:

- N/A
d6cc34c167Bennet Bo Fenner committed on 5/5/2026, 9:58:05 AM· committed by GitHubparentf482f9e
3 files changedLine totals unavailable