tests: kernel: profiling: Add description and doxygen group
tests: kernel: profiling: Add description and doxygen group

Add doxygen group, test description and RTM links for
Profiling test cases.

Signed-off-by: Praful Swarnakar <b56c70d8c3b21a158307ccd68a699c2a05d34cb8@intel.com>

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