[FLINK-36451][runtime] Makes hasLeadership and confirmLeadership work… #857

Job	Run time
Pre-compile Checks / Basic QA	8m 45s
Default (Java 8) / Compile	43m 52s
Default (Java 8) / Test packaging/licensing	1h 44m 22s
Default (Java 8) / E2E (group 1)	2h 31m 16s
Default (Java 8) / E2E (group 2)	2h 53m 18s
Default (Java 8) / Test (module: core)	37m 28s
Default (Java 8) / Test (module: python)	33m 4s
Default (Java 8) / Test (module: table)	36m 57s
Default (Java 8) / Test (module: connect)	22m 24s
Default (Java 8) / Test (module: tests)	50m 27s
Default (Java 8) / Test (module: misc)	47m 39s
	11h 49m 32s

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