tests: drivers: STM32: Enabling ADC tests for nucleo_h7a3zi_q
tests: drivers: STM32: Enabling ADC tests for nucleo_h7a3zi_q

This commit enables test_adc to build and run for this new board

Signed-off-by: Manojkumar Subramaniam <e5bed78df35c9a68cd0ebc89592def76df34c305@electrolance.com>

zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr