[internal] reuse code mirroring, extract from AbstractRector #31646

Job	Run time
Composer Validate	25s
Compatible PHPStan versions	16s
Commented Code	20s
PHPStan	1m 31s
Run with Space in Directory	23s
Preload php-parser Order	25s
Active Classes	31s
Finalize classes	23s
Help and Version	18s
Check before/after test fixture on no-changes	18s
Detect composer dependency issues	22s
Check no "*.php" files in rules Fixture directory	25s
PHP Linter	23s
Check fixture classes are different to nodes	20s
	6m 20s

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