chore: Update to the latest annotate-snippets This PR updates `annotate-snippets` to the latest version and updates the adapter code[^1] so that `AnnotateSnippetEmitter`'s output matches `HumanEmitter`'s output. If anyone would like to see the differences[^2] between `AnnotateSnippetEmitter` and `HumanEmitter`, [I have a branch](https://github.com/Muscraft/rust/tree/annotate-snippets-default-renderer) where `AnnotateSnippetEmitter` is used in place of `HumanEmitter`. [^1]: A lot of the adapter code changes are based on code for `HumanEmitter`. [^2]: Some of the test differences will go away when rust-lang/rust#148001 and rust-lang/rust#148004 are merged.