Bump to PHPStan 2.1.34 and fix compatible code #32095

Job	Run time
Run with Space in Directory	18s
Composer Validate	18s
Preload php-parser Order	21s
PHPStan	59s
Help and Version	19s
Check fixture classes are different to nodes	16s
Finalize classes	19s
Detect composer dependency issues	19s
Active Classes	21s
Check no "*.php" files in rules Fixture directory	16s
Check before/after test fixture on no-changes	16s
Commented Code	20s
Compatible PHPStan versions	14s
PHP Linter	25s
Avoid duplicate short class names	17s
	5m 18s

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