POC - switch CI k8s infra from KinD to Minikube

[vepatel]

https://github.com/nginx/kubernetes-ingress/blob/main/tests/Makefile#L102

[github-actions]

Hi @vepatel thanks for reporting!

Be sure to check out the docs and the Contributing Guidelines while you wait for a human to take a look at this 🙂

Cheers!