Apache Flink

Hi, we are using Flink reactive mode and we're switching all `setParallelism` calls to `setMaxParallelism` , I noticed for sinks (`DataStreamSink`), there is no `setMaxParallelism` function. We do not want to use a global parallelism setting to control the sink's parallelism as other operators will have a higher parallelism count.

Is there another way we can set a max parallelism on a sink in our pipeline?

I noticed that `setMaxParallelism` is not a function for the `DataStreamSink` class. I opened a JIRA ticket and <https://issues.apache.org/jira/browse/FLINK-31873>

and opened a PR to add the function: <https://github.com/apache/flink/pull/22438>