Add PrivatizeFinalClassConstantRector #31778

Job	Run time
Composer Validate	23s
Commented Code	20s
Finalize classes	25s
Active Classes	22s
Help and Version	18s
Preload php-parser Order	22s
Compatible PHPStan versions	22s
Run with Space in Directory	17s
PHPStan	1m 26s
Check fixture classes are different to nodes	19s
Check no "*.php" files in rules Fixture directory	22s
Detect composer dependency issues	27s
PHP Linter	26s
Check before/after test fixture on no-changes	20s
	6m 9s

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