Run integration tests against deployment

[soapy1]

Reference Issues or PRs

#2855

What does this implement/fix?

This PR updates the integration tests to support running against an existing cluster. You can do this by providing the --existing-deployment flag (opposed to the --cloud flag) when running the integration tests. --existing-deployment gets a path to an existing nebari config dir (must contain the nebari-config.yaml and the output dir /stages). For example see How to test this PR?

Also adds these tests to the Local Integration Tests GHA workflow.

Put a x in the boxes that apply

• 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?

How to test this PR?

Create a local deploy of nebari and then run the integration tests.

$ mkdir nebari-local
$ nebari init ....
$ nebari deploy ....
$ cd ./tests/tests_integration
$  pytest -vvv -s --existing-deployment=../../nebari-local .