[DeadCode] Add test for RemoveDoubleAssignRector with reset before throwing assignment #31849

Job	Run time
Preload php-parser Order	28s
Run with Space in Directory	21s
PHPStan	1m 36s
Composer Validate	22s
Commented Code	17s
Finalize classes	32s
Help and Version	16s
Active Classes	25s
Compatible PHPStan versions	27s
Detect composer dependency issues	22s
PHP Linter	32s
Check before/after test fixture on no-changes	20s
Check no "*.php" files in rules Fixture directory	22s
Check fixture classes are different to nodes	20s
	6m 40s

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