chore: migrate to object_store

Move to the more modern and maintained object_store
library to access generic buckets.

We should be able also to do streaming of files now,
and proceed by implementing paginated results for listings
if we want.

Fixes #1.

tests/common/mod.rs

@@ -5,6 +5,7 @@ mod minio;
 
 use {
     anyhow::{Result, anyhow},
+    object_store::ObjectStore,
     reqwest::Url,
     std::{ptr::null_mut, str::FromStr},
     testcontainers::{ContainerAsync, runners::AsyncRunner},
@@ -13,7 +14,7 @@ use {
 
 pub struct Test {
     pub base_url: Url,
-    pub bucket: Box<s3::Bucket>,
+    pub bucket: Box<dyn ObjectStore>,
     pub serves3: tokio::process::Child,
     pub _minio: ContainerAsync<minio::MinIO>,
 }