Allow multiple Streaming queries per panel

[phumberdroz]

Is your enhancement related to a problem? Please describe.

Describe the solution you'd like

I would like to able to have more than one stream in a panel. This is useful for me as I want to display a table with rows that are all from different keys.

Describe alternatives you've considered

I could not come up with alternatives. Especially since the redis data source seems to be the only publicly available data source that supports streaming.

Additional context

With #57 streaming was introduced.

[mikhail-vl]

@phumberdroz Are you talking about Streaming data or Redis Streams? Could you please provide more details.

[phumberdroz]

I am talking about streaming multiple Grafana Queries at the same time from Redis.

This is what the hint currently says:

If checked, the datasource will stream data. Only Ref A is supported.

[mikhail-vl]

@phumberdroz Thank you, I updated the title to Streaming Queries to avoid confusion with Redis Streams.
I will work on it and get back to you shortly.

[phumberdroz]

Thank you so much for adding this 🎉

[mikhail-vl]

@phumberdroz Thank you and I am sorry for the delay.
You can test it using the nightly Docker image and let me know if it works for you.