Add NMStateConfig to InfraEnvCreateParams

https://github.com/openshift/assisted-service/blob/0e229dea8672ef2e5275563c493a42867ea70985/internal/controller/controllers/infraenv_controller.go#L365

The infraenv controller fetches the NMStateConfigs from the kube-api. Since we don't have the kube-api, we need to read them from the manifests and incorporate them into the InfraEnvCreateParams to create the InfraEnv.