RUST-1913 Compilation error when handling ErrorKind::GridFs

[rigens]

Versions/Environment

1. What version of Rust are you using?
   rustc 1.77.2 (25ef9e3d8 2024-04-09)
2. What operating system are you using?
   Ubuntu 20.04
3. What versions of the driver and its dependencies are you using? (Run
   cargo pkgid mongodb & cargo pkgid bson)
   [email protected]
4. What version of MongoDB are you using? (Check with the MongoDB shell using db.version())
   4.2.2
5. What is your MongoDB topology (standalone, replica set, sharded cluster, serverless)?
   standalone

Describe the bug

I get a compilation error when handling ErrorKind::GridFs error

    let client = Client::with_uri_str("mongodb://localhost:27017/test").await.unwrap();
    let db = client.default_database().unwrap();
    let bucket = db.gridfs_bucket(None);
    
    let res = bucket.delete(Bson::String("1234567".to_string())).await;
    
    match res {
        Ok(_) => {println!("ok")}
        Err(err) => {
            match *err.kind {
                ErrorKind::GridFs(_) => {println!("gridfs error")}
                _ => {println!("other mongodb error")}
            }
        }
    }

    |
130 |                 ErrorKind::GridFs(_) => {println!("gridfs error")}
    |                            ^^^^^^ private tuple variant
    |
    |
573 |     #[non_exhaustive]
    |     ----------------- cannot be constructed because it is `#[non_exhaustive]`
574 |     GridFs(GridFsErrorKind),
    |     ^^^^^^

[abr-egn]

Thanks for the bug report! I've just merged #1080 to fix this.