[FLINK-34202][python] Optimize Python nightly CI time #1

Job	Run time
Default (Java 8) / Compile	18m 34s
Pre-compile Checks / Basic QA	5m 58s
Default (Java 8) / Test packaging/licensing	29m 45s
Default (Java 8) / E2E (group 1)	1h 59m 34s
Default (Java 8) / Test (module: core)	34m 50s
Default (Java 8) / E2E (group 2)	2h 18m 13s
Default (Java 8) / Test (module: python)	30m 54s
Default (Java 8) / Test (module: table)	31m 35s
Default (Java 8) / Test (module: connect)	18m 59s
Default (Java 8) / Test (module: tests)	44m 2s
Default (Java 8) / Test (module: misc)	44m 54s
	8h 37m 18s

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