On version 1.9.0 context fetch from S3 is broken since `url.Parse` requires full path: 90e426ba3f/pkg/util/bucket/bucket_util.go (L77)
Currently on a --context=s3://my-bucket/my-path/context.tar.gz we would pass only my-bucket/my-path/context.tar.gz which breaks context fetch
Closes#2200