language_model: Use `LanguageModelToolUseId` instead of a `String` (#25666)

This PR updates the `LanguageModelToolResult` type to use a
`LanguageModelToolUseId` for the tool use ID instead of a `String`.

Release Notes:

- N/A
d82a132477Marshall Bowers committed on 2/26/2025, 5:34:16 PM· committed by GitHubparentf11357d
3 files changedLine totals unavailable