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Feature request or enhancement

For feature requests or enhancements, provide this information, please:

Which use case/requirement will be addressed by the proposed feature?

Debezium vitess connector can only stream a single shard. With this support, a list of shards can be passed in (and accompanying GTIDs). This will allow for users to gradually scale up their debezium connector deploys for large keyspaces with many shards (currently have to jump from one shard to all shards).

Implementation ideas (optional)

Make the vitess.shard and vitess.gtid configs be CSV lists