scaleway/object-bucket v2.0.0

The `endpoint` output previously returned `scaleway_object_bucket.bucket.endpoint`, which Scaleway's provider resolves to a bucket-specific virtual-hosted URL (bucket name baked into the host). Every known consumer of this output (e.g. the `rclone` wiring in `scaleway/compute-instance`) expects a bare regional S3 endpoint, with the bucket name supplied separately — so the old value didn't actually work for that use case.

This output is now computed directly from `scaleway_object_bucket.bucket.region` instead, returning `https://s3..scw.cloud`.

Any consumer that was relying on the bucket name being embedded in this URL will need to append it themselves going forward.

#135