Use kind for k8s and Helm courses

[frmadem]

Motivation

Kind as a small and powerful tool for deploying and inspecting kubernetes on a local computer.

We should use it for our courses, replacing microk8s.

Therefore, we need a new section on the course where we explain how to use it and configure it for different purposes.

Acceptance criteria

• [x] Simple and downloadable bash script that creates a cluster with:
  • a local registry
  • an ingress resolution
  • x number of workers

Acceptance criteria

• [x] Removed doc of microk8s and its related tasks.
• [x] Linked new doc for Kind.
• [x] A section for kind configuration is present in every task. ( a link to it)
• [x] PR verified and merged.
• [x] A specific kind section with particular information about Kind features and functionalities is linked.

[frmadem]

For local registry, check the docs https://kind.sigs.k8s.io/docs/user/local-registry/

[frmadem]

To launch a kind cluster with an ingress https://kind.sigs.k8s.io/docs/user/ingress/

[frmadem]

To create an arbitrary number of nodes, check https://kind.sigs.k8s.io/docs/user/configuration/#nodes