[Bug] Inconsistent Kafka shading among cdc connectors

### Search before asking

- [X] I searched in the [issues](https://github.com/ververica/flink-cdc-connectors/issues) and found nothing similar.


### Flink version

1.14.3

### Flink CDC version

3.0.0

### Database and its version

MySQL 5.7

Mongo 4.4

### Minimal reproduce step

Put flink-sql-connector-tidb-cdc-3.0.0.jar, flink-sql-connector-mysql-cdc-3.0.0.jar and flink-sql-connector-mongodb-cdc-3.0.0.jar into lib folder at Flink home (Flink 1.14 in my case), then create a MySQL CDC table and submit a simple query like select * from mysql_cdc_table, there would be an error:



`java.lang.NoClassDefFoundError: org/apache/kafka/connect/source/SourceRecord`



It's caused by inconsistent shading of  Kafka classes. Only MySQL CDC connector relocated Kafka classes, so if the classpath contains un-relocated classes from other CDC connectors the above error occurs.

### What did you expect to see?

The cdc connectors would not have class conflicts.

### What did you see instead?

The cdc connectors have class conflicts.

### Anything else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!

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