Move apparmor tests installing packages into a specific group

Having many tests on the same group does make the LAVA overlay too big for devices with small amount of free space. Thus some tests randomly fail due to lack of space.

To make things worse, some old tests rely in packages like python which are not part of the images and need to be installed, consuming extra ppace.

To workaround this issue, split the test group in two, moving tests with similar dependencies to a new to reduce the amount of space required per group.

This will be fixed once tests will be moved from pkg/apertis-tests to tests/ but in the meantime let's do the split to reduce the chance of random failures.

See: infrastructure/apertis-issues#593 (closed) and infrastructure/apertis-issues#546