[nrf fromtree] tests: kernel: timer: cycle64: Add support for GRTC#2936

rlubos merged 1 commit intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

adamkondraciuk:NCSDK-30516-Fix-cycle64-tests-for-GRTCadamkondraciuk/sdk-zephyr:NCSDK-30516-Fix-cycle64-tests-for-GRTCCopy head branch name to clipboard