fix(k8s): warning instead of error when cni validation fails#3371

Mia-Cross merged 3 commits intoscaleway:masterscaleway/terraform-provider-scaleway:masterfrom

Mia-Cross:k8s_fix_cni_allowed_valuesMia-Cross/terraform-provider-scaleway:k8s_fix_cni_allowed_valuesCopy head branch name to clipboard