Converting DELIMITED stream to another format fails when VALUE_DELIMITER is specified

[mikebin]

Describe the bug

When creating a new stream in AVRO or JSON format from a source stream defined as DELIMITED with an explicit delimiter set with VALUE_DELIMITER, the CSAS statement fails with error Delimeter only supported with DELIMITED format

To Reproduce

Problem occurs in ksqlDB 0.6.0 and newer CP 5.4.0-SNAPSHOT versions.

Step 1: Create source stream as DELIMITED with an explicit VALUE_DELIMITER:

create stream csv_stream (val1 string, val2 string) with (kafka_topic='csv-data', value_format='delimited', value_delimiter=',', partitions=1);

Step 2: Insert a record into the source topic:

insert into csv_stream (val1, val2) values ('v1', 'v2');

Step 3: Try to create a new derived stream in JSON format from csv_stream:

create stream json_stream with (value_format='json') as select * from csv_stream;

Expected behavior

In the example above, json_stream should successfully be created and convert records from CSV to JSON format in the output stream.

Actual behaviour

Exception occurs when executing the CSAS statement:

Delimeter only supported with DELIMITED format

Note: there's also a typo in the error message. Should say Delimiter instead of Delimeter.