cdc,tikv-sink: validate cluster-id of downstream TiKV cluster to avoid loopback

[pingyu]

Feature Request

Is your feature request related to a problem? Please describe:

Describe the feature you'd like:

Validate cluster-id of downstream TiKV cluster for TiKV sink to be different with upstream, to avoid loopback.

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

[github-actions[bot]]

This issue is stale because it has been open 30 days with no activity.