Add k8s support

[aknot242]

Proposed changes

• Add support for creating and interacting with a k3s cluster running in a container created by lab framework
• Initial support for interacting with an external openshift cluster

Checklist

Before creating a PR, run through this checklist and mark each as complete:

• I have read the contributing guidelines.
• I have signed the F5 Contributor License Agreement (CLA).
• If applicable, I have added tests that prove my fix is effective or that my feature works.
• If applicable, I have checked that any relevant tests pass after adding my changes.
• I have updated any relevant documentation (README.md and/or CHANGELOG.md).

[github-actions]

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