optimize AbstractImmutableNodeTraverser, remove deprecated constants #31677

Job	Run time
Run with Space in Directory	23s
Compatible PHPStan versions	25s
Check before/after test fixture on no-changes	25s
Commented Code	20s
Preload php-parser Order	26s
Composer Validate	17s
Finalize classes	22s
Active Classes	23s
Check fixture classes are different to nodes	24s
Help and Version	21s
PHPStan	1m 26s
PHP Linter	29s
Check no "*.php" files in rules Fixture directory	21s
Detect composer dependency issues	29s
	6m 31s

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