chore(ci): test against Kubernetes 1.37, drop EOL 1.32 and 1.33

[csviri]

Bump minikube to v1.39.0 (newest supported Kubernetes version is v1.37.0)
and update the tested Kubernetes versions to the four currently supported
upstream minors: 1.34, 1.35, 1.36 and 1.37.

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