improve Closure phpdocs #30334

Job	Run time
Behat (8.1, Chrome)	5m 6s
Behat (8.1, Chrome Lowest)	5m 23s
Smoke (latest, Phpunit)	32s
Unit (7.4, Phpunit)	1m 58s
Behat (8.2, Chrome)	5m 40s
Smoke (latest, CodingStyle)	52s
Docs	35s
Unit (7.4, Phpunit Lowest)	2m 0s
Behat (8.2, Chrome Lowest)	5m 23s
Smoke (latest, StaticAnalysis)	36s
Unit (8.0, Phpunit)	1m 56s
Behat (8.3, Chrome)	5m 17s
Unit (8.0, Phpunit Lowest)	1m 58s
Behat (8.3, Chrome Lowest)	5m 13s
Unit (8.1, Phpunit)	2m 10s
Behat (latest, Firefox)	5m 18s
Unit (8.1, Phpunit Lowest)	2m 9s
Behat (latest, Chrome Slow)	9m 33s
Unit (8.2, Phpunit)	2m 13s
Behat (latest, Firefox Slow)	7m 43s
Unit (8.2, Phpunit Lowest)	2m 3s
Unit (8.3, Phpunit)	2m 11s
Unit (8.3, Phpunit Lowest)	2m 0s
Unit (latest, Phpunit Burn)	5m 25s
	1h 23m 14s

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