cleanup StringClassNameToClassConstantRector #31587

Job	Run time
Check before/after test fixture on no-changes	19s
Commented Code	20s
Active Classes	24s
Run with Space in Directory	25s
Preload php-parser Order	25s
Help and Version	20s
Finalize classes	26s
Detect composer dependency issues	24s
PHPStan	1m 30s
Check no "*.php" files in rules Fixture directory	20s
Compatible PHPStan versions	24s
Composer Validate	20s
PHP Linter	27s
Check fixture classes are different to nodes	22s
	6m 26s

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