Update Symfony62Test to cover to not remove existing use statement on rename class

[samsonasik]

This is to cover make consistent to not remove unused use when no auto import (replace) and no $rectorConfig->removeUnusedImports() used, see no namespace vs namespaced class below:

Without namespace (got removed) : https://getrector.com/demo/1fe1232a-4741-4564-b225-8f0822338071
With namespace (unused use is kept) : https://getrector.com/demo/b4de0818-8ca3-496b-92c7-6f54e9ffd4cd

on PR:

• [Renaming] Keep unused import unless configured $rectorConfig->removeUnusedImports() on RenameClassRector on no namespace rector-src#3460

[samsonasik]

All checks have passed 🎉 @TomasVotruba I think it is ready.

[TomasVotruba]

Thanks 👍