Issue when configure remote storage with prefix

[kphk]

https://github.com/magento/magento2/blob/5a2037c35de89ce2c50e230164ff3ea7b67ac127/app/code/Magento/AwsS3/Driver/AwsS3Factory.php#L159

This will result the $objectUrl https://<bucket>.s3.<region>.amazonaws.com<prefix>/

Expected result should be https://<bucket>.s3.<region>.amazonaws.com/<prefix>/

[m2-assistant[bot]]

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