sink(ticdc): DDL event support for the Debezium protocol

[wk989898]

What problem does this PR solve?

Issue Number: close #11566

What is changed and how it works?

Debezium provides the SQL CREATE, ALTER, or DROP statement that results in the schema change. https://debezium.io/documentation/reference/2.7/connectors/mysql.html#mysql-schema-change-topic This PR implements encoding for the DDL event and checkpoint event.

Check List

Tests

• Unit test
• Integration test

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

yes

Release note

DDL event support for the Debezium protocol