Enable management of MKP packages with server role

[ra2xfael]

This pull request tries to enable the installation and management of MKP packages specified by site. Packages can be downloaded or provided on the ansible controller and will be installed, enabled, disabled or removed from the sites.

Pull request type

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

CheckMK MKP packages installation and management is not possible with the server role.

What is the new behavior?

• Download of mkp packages using HTTP(S)
• Copying of mkp packages from the ansible controller
• MKP packages can be installed, enabled, disabled and removed from specific sites.

[robin-checkmk]

Thanks for this contribution @ra2xfael, looks pretty neat! 💪
Please try to satisfy the tests, as a review on our end might take some time.
But rest assured, we will get back to you when we can. ✌️