[parent issue] Apache Pulsar related open topics

[hpvd]

just to have a good overview on all Pulsar related open topics,
and only filtering for "pulsar" does not give the right picture, because many issues just mention Pulsar in code blocks or as example,
this is a manual build list:

Open issues:

• [Flaky test]: PulsarConsumerTest, testPartitionLevelConsumerBatchMessages #13008
• Pulsar test instability #8537
• Support multi-topic subscriptions with Apache Pulsar #8806
• Dependency isolation in Integration Tests #8234
• Pinot tooling to test streaming connectivity #7298

open pull request:

• Pulsar integration test #8235

[Jackie-Jiang]

Thanks for summarizing them!