Fail to read empty Iceberg table with `iceberg` table function

[alsugiliazova]

Describe the unexpected behaviour

Now, using latest antalya build (25.2.2.27662), I get this exception trying to read empty table:
Code: 715. DB::Exception: Received from localhost:9000. DB::Exception: The data format cannot be detected by the contents of the files, because there are no files with provided path in S3ObjectStorage or all files are empty. You can specify the format manually: The data format cannot be detected by the contents of the files. You can specify the format manually. (CANNOT_DETECT_FORMAT)

On plain 25.2 I don't see any exception, I get expected result: 0 rows.

Seems like this is the cause:
https://clickhouse.com/docs/integrations/iceberg#aliases

iceberg should be an alias to icebergS3.