Microk8s: Add microk8s to list of support kubernetes in jenkins-x

[carmine]

Jenkins-x is the opinionated way to do jenkins, natively on kubernetes. It has several integrations with other kubernetes providers and/or clouds, including minikube and minishift:

https://github.com/jenkins-x/cloud-environments

It'd be great to add microk8s to that list.

[bohushvitali]

It would be perfect to enable Jenkins X as an add-on in MicroK8s

[stale[bot]]

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