Add warning if Kueue CRDs not installed on cluster

[oksanabaza]

Issue link

RHOAIENG-6294

What changes have been made

A warning has been added to the ClusterConfiguration cell to inform users if Kueue CRDs are not installed on the cluster and local_queue is not provided. In this scenario, users will receive informative logs indicating that the absence of CRDs may result in missing functionality.

Verification steps

Uninstall Kueue and delete any CustomResourceDefinitions (CRDs) that exist (filter for CustomResourceDefinition in resources and select LocalQueue in the name). Clone this branch into Jupyter Notebook, attempt to create a Ray cluster. In the ClusterConfiguration cell, comment out the local_queue="local-queue-name" line. When you run it, you should receive a message indicating that Kueue is not installed or won't be used. The absence of CRDs may result in missing functionality.

Checks

• [ ] I've made sure the tests are passing.
• Testing Strategy
  • [ ] Unit tests
  • [x] Manual tests
  • [ ] Testing is not required for this change

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-merge-robot]

PR needs rebase.

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[oksanabaza]

Closing this pull request as the previous changes cover this issue