Updates to Async and Side Output based on Eng Feedback

[jeremyber-aws]

Purpose of the change

For example: modify the Java Kinesis Sink to provide the stream ARN

Verifying this change

Please test your changes both running locally, in the IDE, and in Managed Service for Apache Flink. All examples must run
in both environment without code changes.

Describe how you tested your application, show the output of the running application with screenshots.

Significant changes

(Please check any boxes [x] if the answer is "yes". You can first publish the PR and check them afterward, for convenience.)

• Completely new example
• Updated an existing example to newer Flink version or dependencies versions
• Improved an existing example
• Modified the runtime configuration of an existing example (i.e. added/removed/modified any runtime properties)
• Modified the expected input or output of an existing example (e.g. modified the source or sink, modified the record schema)

[nicusX]

LGTM