Heightmap & compute flocking demos fail to launch (Raspberry Pi 4 & 5)

[cklosters]

The heightmap and computeflocking demos don't launch on the raspberry pi (4 & 5, bookworm arm64) and freeze the system. I have disabled them in cmake for the moment, when we build on (target) the pi:

-- Detected Raspberry Pi model 5
-- NAP version: 0.7.5
-- Skipping target: heightmap, not supported on Raspberry Pi
-- Skipping target: computeflocking, not supported on Raspberry Pi

Note that the demos run fine on all other platforms and the vulkan validation layer doesn't log any issues, making it rather difficult to trace the issue. I have a hunch it has to do with not supported single channel textures and compute shader optimizations, but not sure until we can pin-point the exact location.

[cklosters]

We should check if this is still the case with arm64 and newer builds of the framework / raspbian.