mesa-vpu: don't install mesa-vpu on minimal images

[igorpecovnik]

Description

Keeping minimal images as minimal as possible. Addition to: https://github.com/armbian/build/pull/7318

How Has This Been Tested?

CI throws error when trying to add PPA:add-apt-repository: command not found We don't (want) to have software-properties-common package and dependencies on minimal images.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] Any dependent changes have been merged and published in downstream modules

[EvilOlaf]

Not sure if doing this "silently" is the right approach. What's the reason not to add a hint mesa-vpu is not being installed when minimal is selected? and what to do if users want it anyways for wahtever reason?

[igorpecovnik]

Added warning instead.

[igorpecovnik]

CI breaks without this. Different way can be done later if desired.