feat: Add support for ALTER STREAM|TABLE

[jzaralim]

Description

Add new syntax, ALTER STREAM|TABLE. It works as follows:

ksql> alter stream riderlocations add column name string;

 Message
-------------------------------
 Stream RIDERLOCATIONS altered
-------------------------------

ksql> describe extended riderlocations;

...
Statement            : CREATE STREAM riderLocations (profileId VARCHAR, latitude DOUBLE, longitude DOUBLE)
  WITH (kafka_topic='quickstart-locations', value_format='json', partitions=1);alter stream riderLocations add column a string;alter stream riderlocations add column name string;

 Field     | Type
-----------------------------
 PROFILEID | VARCHAR(STRING)
 LATITUDE  | DOUBLE
 LONGITUDE | DOUBLE
 NAME      | VARCHAR(STRING)
-----------------------------

It only works on data sources that are created using DDL statements.

Fixes #6038

Testing done

Unit and QTT tests.

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")

[JimGalasyn]

LGTM!

[agavra]

Thanks @jzaralim! This approach is pretty clean and straightforward. Devil is in the details, so I've added a bunch of comments around that.

[jzaralim]

I did not write a very good commit message, so here are the main changes in the most recent commit:

• switching to YATT tests
• adding a Column serializer/deserializer
• added a new KsqlException type for duplicate columns

[agavra]

LGTM! Awesome work @jzaralim