Right now mongo connector does not support oplog with noop operation, I think we should expose noop events as well, at least controller by a flag.

Because under the hood, a noop oplog is how mongo is going to support pre-image on 6.0+: https://www.alexbevi.com/blog/2020/07/15/mongodb-4-dot-4-change-streams-and-pre-image-support/