sink(ticdc): support debezium avro format

[harveyyue]

What problem does this PR solve?

Issue Number: close #11455

What is changed and how it works?

1. Add a Format interface to encode row change event key and value in codec/encoder.go
2. Extract common avro methods from base avro encoder to Codec struct and implement the format interface
3. Add debezium avro support for build key/value schema and convert to avro data in Codec struct

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

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

Release note

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[ti-chi-bot]

Hi @harveyyue. Thanks for your PR.

I'm waiting for a pingcap member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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PR needs rebase.

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