S3AUtils.translateException to map CredentialInitializationException to AccessDeniedException

Currently S3AUtils.translateException will convert NoAuthWithAWSException AccessDeniedException but not the superclass CredentialInitializationException.

That is just mapped to the generic AWSClientIOException, which is considered retryable on idempotent calls.

This means that if any DT provider/AWS auth chain raises CredentialInitializationException., such as during the FS init, the operation will be retried until it eventually times out.