flex karpenter node-pool configurations

[myaser]

• make the instanceType column non mandatory for karpenter pools
• parse a node pool config item "requirements" to allow injecting granular karpenter pool requirements
  example:

  - config_items:
      taints: nvidia.com/gpu=present:NoSchedule
      requirements: |
        - key: karpenter.k8s.aws/instance-gpu-manufacturer
          operator: In
          values: 
            - nvidia
    discount_strategy: null
    instance_types: null
    max_size: null
    min_size: null
    name: karpenter-gpu
    profile: worker-karpenter

related to zalando-incubator/kubernetes-on-aws#7617

[demonCoder95]

👍

[myaser]

👍🏻