[internal-adc] Implemented simple selfTest and commented code

sbs.conf

src/shared/drivers/adc/ADC.h

src/shared/drivers/adc/InternalADC.h

src/shared/drivers/adc/InternalADC/InternalADC.cpp

src/shared/drivers/adc/InternalADC/InternalADC.h

src/shared/drivers/adc/InternalADCData.h

src/shared/sensors/Sensor.h

src/tests/drivers/test-internal-adc-dma.cpp

src/tests/drivers/test-internal-adc.cpp