Add diff and check modes support for NTP module #1859

Job	Run time
sanity / py3.7 / ubuntu-latest / stable-2.9	3m 49s
sanity / py3.8 / ubuntu-latest / stable-2.9	3m 34s
sanity / py3.8 / ubuntu-latest / stable-2.13	2m 47s
sanity / py3.9 / ubuntu-latest / stable-2.13	2m 51s
sanity / py3.10 / ubuntu-latest / stable-2.13	2m 46s
sanity / py3.9 / ubuntu-latest / stable-2.14	2m 54s
sanity / py3.10 / ubuntu-latest / stable-2.14	2m 47s
sanity / py3.11 / ubuntu-latest / stable-2.14	2m 42s
sanity / py3.9 / ubuntu-latest / stable-2.15	2m 59s
sanity / py3.10 / ubuntu-latest / stable-2.15	3m 30s
sanity / py3.11 / ubuntu-latest / stable-2.15	2m 34s
sanity / py3.10 / ubuntu-latest / milestone	2m 58s
sanity / py3.11 / ubuntu-latest / milestone	2m 33s
sanity / py3.10 / ubuntu-latest / devel	2m 55s
sanity / py3.11 / ubuntu-latest / devel	2m 36s
sanity / py3.6 / ubuntu-20.04 / stable-2.9	3m 3s
changelog / Require a changelog	8s
	47m 26s

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