Reflect ZEPPELIN-5352 changes in docs

[ottobricks]

What is this PR for?

https://issues.apache.org/jira/browse/ZEPPELIN-5352
Changes made to add support for Flink in k8s mode were not reflected in the interpreter documentation.

What type of PR is it?

Documentation

Todos

• - Review change

What is the Jira issue?

Not provided because public signup is disabled

How should this be tested?

Manual review

Screenshots (if appropriate)

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? Yes, support for 'kubernetes-application' >= 0.10.1
• Does this needs documentation? No

[zjffdu]

Thanks for the contribution, @ottok92 BTW, have you even tried run flink on k8s in Zeppelin?

[ottobricks]

@zjffdu not yet but I will try it over the next couple of days and let you know if I find any issue 👍🏻

[ottobricks]

@zjffdu it seems this zeppelin-server.yaml is particularly setup for Spark.
I tried defining ZEPPELIN_FLINK_APPLICATION_MODE: kubernetes-application and embedding Flink in zeppelin-interpreter image under /opt/flink as suggested here. So far, I haven't had luck making it work.
For sanity, I ran the quickstart steps for Zeppelin on Spark on k8s and that works fine.

Could you perhaps share some tips to reproduce your testing of this?