Update deprecated generate-groups.sh to kube_codegen

[spolti]

/kind bug

$ make generate
test -s /Users/fspolti/data/dev/sources/kserve/bin/controller-gen || GOBIN=/Users/fspolti/data/dev/sources/kserve/bin go install sigs.k8s.io/controller-tools/cmd/controller-gen@v0.12.0                                                                ─╯
go env -w GOFLAGS=-mod=mod
warning: go env -w GOFLAGS=... does not override conflicting OS environment variable
hack/update-codegen.sh
WARNING: generate-groups.sh is deprecated.
WARNING: Please use k8s.io/code-generator/kube_codegen.sh instead.

WARNING: generate-internal-groups.sh is deprecated.
WARNING: Please use k8s.io/code-generator/kube_codegen.sh instead.

What steps did you take and what happened:
[A clear and concise description of what the bug is.]

What did you expect to happen:

What's the InferenceService yaml:
[To help us debug please run kubectl get isvc $name -n $namespace -oyaml and paste the output]

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Istio Version:
• Knative Version:
• KServe Version:
• Kubeflow version:
• Cloud Environment:[k8s_istio/istio_dex/gcp_basic_auth/gcp_iap/aws/aws_cognito/ibm]
• Minikube/Kind version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[spolti]

/assign