Temporary require --dev phpstan/phpstan:2.1.34 on packages-tests CI uses to make main branch CI green #32116

Job	Run time
Composer Validate	19s
Check before/after test fixture on no-changes	21s
Avoid duplicate short class names	15s
Check fixture classes are different to nodes	15s
Compatible PHPStan versions	16s
PHP Linter	25s
Active Classes	20s
Commented Code	19s
Preload php-parser Order	21s
Help and Version	20s
Finalize classes	18s
Check no "*.php" files in rules Fixture directory	20s
Detect composer dependency issues	20s
PHPStan	1m 3s
Run with Space in Directory	22s
	5m 34s

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