Fix test: SetManagerTest #33218

Job	Run time
Validate rule definitions	20s
Compatible PHPStan versions	16s
Composer Validate	19s
Avoid duplicate short class names	20s
Finalize classes	18s
Check before/after test fixture on no-changes	20s
Check fixture classes are different to nodes	21s
PHP Linter	24s
Commented Code	22s
Preload php-parser Order	19s
Active Classes	20s
Run StructArmed	19s
PHPStan	59s
Help and Version	14s
Run with Space in Directory	21s
Check no "*.php" files in rules Fixture directory	16s
	5m 48s

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