test: handle disabled queueing in SignalsWaitOperationsTestCase
test: handle disabled queueing in SignalsWaitOperationsTestCase

Don't perform any tests for queueing if
CONFIG_MAIN_THREAD_QUEUED_SIGNALS is undefined or zero.
CezaryGapinski/distortos,CezaryGapinski/distortos,DISTORTEC/distortos,jasmin-j/distortos,jasmin-j/distortos,DISTORTEC/distortos,jasmin-j/distortos,DISTORTEC/distortos,jasmin-j/distortos,DISTORTEC/distortos,CezaryGapinski/distortos,CezaryGapinski/distortos,CezaryGapinski/distortos,jasmin-j/distortos