Dedupe the Karpenter Nodepools In the spark operator blueprint

[alanty]

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What is the outcome that you are trying to reach?

Reduce the complexity of the karpenter nodepool configuration for the Spark examples.

Describe the solution you would like

The karpenter nodepools could be combined and node selectors added to the examples to tailor the instance selection down. Ideally we can combine the nodepools that are using the same instances/configurations (or close enough).

Describe alternatives you have considered

Additional context