don't set /etc/hosts

[pmeier]

What does this implement/fix?

There are basically two scenarios:

1. We have domain and can set the DNS. In that case there is no need to set /etc/hosts since the DNS is handling it for us
2. We don't have a domain. In that case setting /etc/hosts is not enough. See [BUG] - Installing nebari locally (local with kind) fails. #1703 (comment) and [BUG] - local deploy cannot guaranteed be done without having access to a domain #1707.

Thus, there is no need to set it at all. This PR removes it from CI to see if anything breaks (it shouldn't). If we move forward here, we also need to send a PR to the docs and remove that section there.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

• Did you test the pull request locally?
• Did you add new tests?

[pmeier]

Closing this since the k8s tests are not run from forks:

nebari/.github/workflows/kubernetes_test.yaml

Lines 35 to 36 in 4c64f6f

	test-kubernetes:
	if: github.event.pull_request.head.repo.full_name == github.repository || github.event_name != 'pull_request'