samples: power_mgr: add harnesss configuration
samples: power_mgr: add harnesss configuration

This test prints out to the console, when testing on real hardware,
parse output and compare to what we are expecting to avoid timeouts.

Signed-off-by: Anas Nashif <0d9952ec84ac43c159f6b7e7ed99a9080c00dd6e@intel.com>

explora26/zephyr,kraj/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,punitvara/zephyr,explora26/zephyr,Vudentz/zephyr,kraj/zephyr,punitvara/zephyr,kraj/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,explora26/zephyr,punitvara/zephyr,mbolivar/zephyr,ldts/zephyr,kraj/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,ldts/zephyr,finikorg/zephyr,zephyriot/zephyr,nashif/zephyr,ldts/zephyr,punitvara/zephyr,galak/zephyr,finikorg/zephyr,punitvara/zephyr,mbolivar/zephyr,galak/zephyr,Vudentz/zephyr,ldts/zephyr,mbolivar/zephyr,Vudentz/zephyr,zephyriot/zephyr,finikorg/zephyr,Vudentz/zephyr,zephyriot/zephyr,finikorg/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,mbolivar/zephyr,nashif/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,explora26/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr