QA Kubernetes Tasks

[joshmeek]

Thanks for contributing to Prefect!

Please describe your work and make sure your PR:

• adds new tests (if appropriate)
• updates CHANGELOG.md (if appropriate)
• updates docstrings for any new functions or function arguments, including docs/outline.toml for API reference docs (if appropriate)

Note that your PR will not be reviewed unless all three boxes are checked.

What does this PR change?

QA'd the k8s tasks and found that the API secret was required, adjusted so it can be provided as None. This required tests to be updates slightly. Also added tests for each task's in/out of cluster configuration connections.

Why is this PR important?

Secret was required and some connection options went untested

[codecov]

Codecov Report

Merging #1559 into master will increase coverage by 1.68%.
The diff coverage is 99%.

[cicdw]

Awesome nice QA work; not going to Request Changes since I know this is touches a large number of tasks, but should we update the documentation anywhere to describe this pattern of setting the secret key to None to enable a different connection option?

[joshmeek]

Yeah I’ll update the docstrings, good call