[nrf fromlist] tests: drivers: clock_control_api: move startup time to Kconfig#2816

rlubos merged 2 commits intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

mstasiaknordic:test_clock_control_apimstasiaknordic/sdk-zephyr:test_clock_control_apiCopy head branch name to clipboard