Auto merge of #13051 - DropDemBits:attrs-and-comments-on-enum-variant, r=jonas-schievink

fix: Only move comments when extracting a struct from an enum variant

Motivating example:

```rs
#[derive(Debug, thiserror::Error)]
enum Error {
    /// Some explanation for this error
    #[error("message")]
    $0Woops {
        code: u32
    }
}
```
now becomes
```rs
/// Some explanation for this error
#[derive(Debug, thiserror::Error)]
struct Woops{
    code: u32
}

#[derive(Debug, thiserror::Error)]
enum Error {
    #[error("message")]
    Woops(Woops)
}
```
(the `thiserror::Error` derive being copied and the struct formatting aren't ideal, though those are issues for another day)

0 files changed, 0 insertions, 0 deletions