[cleanup] Make FirstClassCallableRector use attributes over node traverser hacks #31598

Job	Run time
Composer Validate	21s
Run with Space in Directory	18s
Active Classes	20s
Help and Version	18s
Commented Code	22s
Compatible PHPStan versions	16s
PHPStan	1m 47s
Check before/after test fixture on no-changes	16s
Preload php-parser Order	40s
Finalize classes	23s
Check fixture classes are different to nodes	20s
Check no "*.php" files in rules Fixture directory	19s
PHP Linter	25s
Detect composer dependency issues	27s
	6m 32s

Provide feedback