NIFI-13681 Fix Kubernetes coordination environment variable names

[malthe]

Summary

NIFI-13681

The Kubernetes-related coordination settings draw on environment variables that do not accurately reflect their property names, leading to confusion.

Tracking

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• Apache NiFi Jira issue created

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  • JDK 21

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[exceptionfactory]

@malthe Thanks for the contribution. I am in favor of this change as it aligns the environment variable name with the property name.

Every change needs a corresponding Apache NiFi Jira issue, so if you can create the Jira issue, then update the pull request title and commit messages with the Jira issue number, this should be ready to go forward.

[malthe]

@exceptionfactory done!

[exceptionfactory]

Thanks again for linking the Jira issue @malthe! +1 merging