Move aum-offline tests back to Fixed Function
This reverts commit daf18238 "Move aum-offline test to HMI images"
to some extent by moving back to the fixedfunction images the offline
upgrade tests with the Apertis Update Manager now that udisks2 is
installed there.
The move to the HMI images prevented testing offline updates on the R-Car boards, which does not supports HMI images due to the lack of any open graphical stack.
By using the fixedfunction images offline upgrades can be tested again
on R-Car boards, like it is done on the minimal images from older
release streams.
Needs infrastructure/apertis-image-recipes!452 (merged) to be merged first.