Support for setting MarketType/InstanceMarketOptions for use with "capacity-block"

[dims]

Needed for enabling/using Capacity Blocks for ML

• https://docs.aws.amazon.com/eks/latest/userguide/capacity-blocks.html
• https://docs.aws.amazon.com/eks/latest/userguide/capacity-blocks-mng.html
• https://docs.aws.amazon.com/autoscaling/ec2/userguide/launch-template-capacity-blocks.html

Ensures that LaunchTemplateData will end up with InstanceMarketOptions/MarketType when CapacityReservation/CapacityReservationID is set like so:

nodeGroups:
  - name: cbr
    instanceType: p5en.48xlarge
    minSize: 2
    maxSize: 2
    availabilityZones: ["us-east-2c"] # match AZ where reservation is deployed
    capacityReservation:
      capacityReservationTarget:
        capacityReservationID: "cr-028e8bdd6334b8012"
    instanceMarketOptions:
      marketType: capacity-block
    overrideBootstrapCommand: | # utilize the local instance store volumes
      apiVersion: node.eks.aws/v1alpha1
      kind: NodeConfig
      spec:
        instance:
          localStorage:
            strategy: RAID0

Resolves #8155