API Explicity mark nullable parameters for PHP 8.4 #704

Job	Run time
ci / Context	1s
ci / Generate matrix	24s
ci / 8.3 prf-low mariadb phpunit all	3m 21s
ci / Check governance	0s
ci / 8.3 mysql80 phpunit all	3m 36s
ci / 8.3 mysql84 phpunit all	3m 58s
ci / 8.3 mysql80 phplinting	2m 5s
ci / 8.3 mysql80 endtoend root job1	6m 15s
ci / 8.3 mysql80 endtoend root job2	8m 1s
ci / 8.3 mysql80 js	4m 7s
ci / 8.3 mysql80 doclinting	2m 43s
ci / Dispatch tag patch release	0s
	34m 31s

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