Refactor error management in API part

src/api/s3_copy.rs

@@ -6,13 +6,14 @@ use hyper::{Body, Response};
 
 use garage_table::*;
 use garage_util::data::*;
-use garage_util::error::Error;
 
 use garage_model::block_ref_table::*;
 use garage_model::garage::Garage;
 use garage_model::object_table::*;
 use garage_model::version_table::*;
 
+use crate::error::*;
+
 pub async fn handle_copy(
 	garage: Arc<Garage>,
 	dest_bucket: &str,