tests: zbus/hlp_priority_boost: skip Intel audio DSP platforms

All Intel Audio DSP platforms have non-coherent cache between
CPUs. So the zbus_channel struct data goes out-of-sync between
CPUs with multiple producer and consumer threads running
concurrently on multiple CPUs, resulting in bad pointer being
used, e.g. passed to memcpy(). So exclude these platforms from
running in twister as they are certain to fail.

Fixes: #79368

Signed-off-by: Daniel Leung <daniel.leung@intel.com>