Register FunctionLikeToFirstClassCallableRector to PHP 8.1 set #30998

Job	Run time
Active Classes	27s
PHP Linter	34s
Commented Code	26s
Run with Space in Directory	21s
Composer Validate	22s
Check no "*.php" files in rules Fixture directory	17s
Preload php-parser Order	20s
Compatible PHPStan versions	18s
Check before/after test fixture on no-changes	22s
Help and Version	21s
Detect composer dependency issues	23s
Finalize classes	19s
PHPStan	1m 28s
	5m 58s

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