[ci] Run PHPUnit 12 and PHPStan compatibilty check #30907

Job	Run time
PHPStan	1m 27s
Active Classes	26s
Check before/after test fixture on no-changes	18s
Help and Version	16s
Commented Code	28s
Preload php-parser Order	18s
Compatible PHPStan versions	17s
Check no "*.php" files in rules Fixture directory	16s
Composer Validate	20s
Run with Space in Directory	21s
PHP Linter	33s
Detect composer dependency issues	27s
Finalize classes	20s
	5m 47s

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