[nrf fromtree] Enable adc tests on nrf54l20pdk#2497

rlubos merged 3 commits intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

nordic-segl:NRFX-6832_Enable-ADC-tests-on-nrf54l20pdknordic-segl/sdk-zephyr:NRFX-6832_Enable-ADC-tests-on-nrf54l20pdkCopy head branch name to clipboard