Make integration tests compatible with the next-gen TiDB cluster.

[tenfyzhong]

• Create a setup cluster script for the next-gen TiDB cluster
• Make the stop cluster script compatible with the next-gen TiDB cluster
• The cdc cli should be invoked with the -k flag.

[tenfyzhong]

/type enhancement

[tenfyzhong]

/assign @tenfyzhong