Instead of returning the error right away, append the error when `ListObject` is successful but the key expected if not found.
This can be caused if the credentials do not have `s3:PutObject` but have `s3:ListBucket`. Without `s3:PutObject`, the object will not be written to S3 so other calls to find the object will not be successful even if they have valid permissions.
This prevents us from returning a `write` error on Boundary because the list call will always fail. Without this, the Permissions are not wrapped and the SBC states are all set to `unknown` even though we know certain permission failed.
Elim Tsiagbey
f51527937f