Hypershift hosted clusters in AWS ISO (classified) regions fail to honor AMI overrides in NodePool specifications causing node pool deployments to fail.  

The offending code appears to be at https://github.com/openshift/hypershift/blob/main/hypershift-operator/controllers/nodepool/token.go#L137, which fails to take into account the AMI override defined in nodePool.Spec.Platform.AWS.AMI.  

Additionally, there's no provision for handling the lack of release image metadata in the ISO regions at https://github.com/openshift/hypershift/blob/main/hypershift-operator/controllers/nodepool/nodepool_controller.go#L723-L726.

An example of where the AMI override *is* being honored can be seen at https://github.com/openshift/hypershift/blob/main/hypershift-operator/controllers/nodepool/aws.go#L56-L57.

This is preventing a customer from moving forward with their HCP implementation.

Consistently fails when attempting to deploy in AWS ISO (classified) regions.    

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