[FLINK-36941][docs] Update DATE_FORMAT Doc and Python Tests #5

Job	Run time
Default (Java 8) / Compile	28m 38s
Pre-compile Checks / Basic QA	14m 31s
Default (Java 8) / Test packaging/licensing	36m 10s
Default (Java 8) / E2E (group 1)	1h 40m 24s
Default (Java 8) / Test (module: core)	36m 7s
Default (Java 8) / E2E (group 2)	2h 11m 0s
Default (Java 8) / Test (module: python)	10m 29s
Default (Java 8) / Test (module: table)	36m 10s
Default (Java 8) / Test (module: connect)	19m 18s
Default (Java 8) / Test (module: tests)	47m 38s
Default (Java 8) / Test (module: misc)	22m 8s
	8h 2m 33s

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