[tests] add known iterable types #30666

Job	Run time
PHPStan	1m 26s
Composer Validate	18s
Preload php-parser Order	25s
Commented Code	17s
Run with Space in Directory	29s
Help and Version	25s
Active Classes	22s
Check before/after test fixture on no-changes	24s
Finalize classes	28s
Check no "*.php" files in rules Fixture directory	23s
Compatible PHPStan versions	24s
Detect composer dependency issues	17s
	5m 38s

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