changed to run nightly build pipeline only on sunday at 6 AM #4213

Job	Run time
check-formating	1m 25s
unit-tests	5m 40s
build-operator-image	7m 34s
vulnerability-scan	1m 1s
smoke-tests (basic)	1h 14m 1s
smoke-tests (appframeworks1)	1h 22m 51s
smoke-tests (managerappframeworkc3)	2h 10m 56s
smoke-tests (managerappframeworkm4)	1h 35m 32s
smoke-tests (managersecret)	1h 18m 22s
smoke-tests (managermc)	1h 5m 31s
push-latest	0s
	9h 2m 53s

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