Option to choose kubectl version

[ashishapy]

kconnect setup the latest kubectl version
As per K8s version skew policy https://kubernetes.io/docs/setup/release/version-skew-policy/#kubectl

We must use a kubectl version that is within one minor version difference of your cluster. For example for 1.16 EKS cluster, kubectl version can not be greater than v1.17 and can not be less than v1.15.

Please provide an option to user to enter which version of K8s cluster they are in & setup kubectl cli accordingly. At least support last 4 versions of kubectl cli.

[richardcase]

Thanks @ashishapy, this is an interesting one as we requite v1.17 or later as we use extensions in the kubeconfig

[ashishapy]

Ok, then let's start giving options to install kubectl cli v1.17 onwards.

[ashishapy]

I suppose that is the reason I was getting below error, when I use kubectl v1.16.13 because it doesn't support extensions in the kubeconfig

>$ kubectl config view
error: converting  to : type names don't match (Unknown, RawExtension), and no conversion 'func (runtime.Unknown, runtime.RawExtension) error' registered.