tests: kernel/smp: disable torture test for Intel audio DSP sim

This sets the run factor for Intel audio DSP simulators to zero.
The simulator is pretty much serialized so SMP switching torture
does not really test concurrent operations, and they are taking
too much time causing timeouts on CI. So sets the run factor to
zero to disable the switch torture test.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Ederson de Souza <ederson.desouza@intel.com>
Signed-off-by: Daniel Leung <daniel.leung@intel.com>