fix(scripts): deploy-ibm-vpc.sh public gateway detection. (#622)
fix(scripts): deploy-ibm-vpc.sh public gateway detection. (#622)

A VPC may have more than one public gateways and they may be in
different cluster zones. So now filtering on cluster_zone and
picking the first public gateway.
kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton,kubeflow/kfp-tekton