fix: Register the s3:// scheme when an S3 connection is configured

[sweb]

Description

Right now, you need to tell Trino explicitly to write to s3a:// when issuing a CTAS against the Hive Metastore (e.g. for Iceberg tables) - by also registering the s3:// scheme, this is no longer required and can stay with the s3:// scheme.

Important to note: If we decide that this is a good direction, we should also add the s3:// scheme to the Spark configuration so that this works cross products without additional configuration.

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