Add reference to Apache Impala documentation

[tmater]

No description provided.

[pvary]

@samredai: Any comment on this?
Can I merge this PR?

Thanks,
Peter

[samredai]

I'm ok with adding this now and moving it later, but having individual items in the top navbar for each engine will go away soon (see PR #75) in favor of just a "Quickstart" and "Overview" nav element.

There will be a separate "Integrations" section in the docs left-nav where all integrations will be listed/described which is where this should exist. Following up with an Impala QuickStart that uses docker would also be helpful.

[pvary]

@samredai: Any timeline for #75? There are some Hive (#4915) and CDP (#4536) PRs waiting for it for a while now. If we merge #75 soon, I am all for waiting for the final version, but it would be good if the users could see the Hive/Impala docs soon.

[samredai]

I'm finishing up #91 now which should be ready to review today. Once that's merged then #75 just needs to be rebased and merged. I'm hoping to wrap this all up this week.

[pvary]

I'm finishing up #91 now which should be ready to review today. Once that's merged then #75 just needs to be rebased and merged. I'm hoping to wrap this all up this week.

Thanks @samredai! Then I think we should wait a little bit more.

[pvary]

Hi @samredai!
Any news? We would like to make the Apache Impala / Apache Hive docs available soon. Maybe we just merge them now, and do the rebase with the other rebase work?
Thanks,
Peter

[samredai]

Hey @pvary, just putting the finishing touches on the other PRs. I'm ok with this getting merged now and I can make any required format changes later if needed! cc: @rdblue