docs: Combines all MicroK8s related commands in 1 step

[gruyaume]

Description

MicroK8s addon management used to be done in 2 different places in the tutorial. We now combine all MicroK8s related operations in one section to logically separate it from the rest.

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that validate the behaviour of the software
• [ ] I validated that new and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
• [ ] I have bumped the version of the library