Support `iterable` typed parameter #2574

Job	Run time
PHPUnit (7.4, mysql:8.0, pdo-mysql, recording, highest)	50s
PHPUnit (reflection replay) (8.1, pdo-mysql, replay)	37s
PHPUnit (reflection replay) (8.1, mysqli, replay)	27s
PHPUnit (8.0, mysql:8.0, pdo-mysql, recording, highest)	52s
PHPUnit (8.0, mysql:8.0, mysqli, recording, highest)	58s
PHPUnit (8.1, mysql:8.0, mysqli, recording, highest)	59s
PHPUnit (8.1, mariadb:latest, mysqli, recording, highest)	37s
PHPUnit (8.2, mysql:8.0, mysqli, recording, highest)	51s
PHPUnit (8.2, mariadb:latest, mysqli, recording, highest)	56s
PHPUnit (8.1, mysql:8.0, pdo-mysql, replay-and-recording, highest)	51s
PHPUnit (8.1, mysql:8.0, pdo-mysql, empty-recording, highest)	52s
PHPUnit (8.1, mysql:8.0, pdo-mysql, empty-replay-and-recording, highest)	1m 0s
	9m 50s

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