Narrow subtype for RecursiveIteratorIterator $iterable param

[simPod]

https://phpstan.org/r/ec7fe70c-0127-45a4-9f83-f9d8bd63304f

<?php declare(strict_types = 1);

new RecursiveIteratorIterator((function() { yield 22; })());

This code crashes https://3v4l.org/evDe2 because RecursiveIteratorIterator's template T in stub is of \Traversable and not of \RecursiveIterator|\IteratorAggregate as specified in docs https://www.php.net/manual/en/recursiveiteratoriterator.construct.php

(crosslink phpstan/phpstan-src#228)

[ondrejmirtes]

Implemented: phpstan/phpstan-src@d28b61b

[github-actions]

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