[DX] Remove parent node from AbstractRector

[TomasVotruba]

No description provided.

[samsonasik]

RunTestsInSeparateProcesses may need to be used in RenameClasaRector tests

[samsonasik]

AutoImportNamesTest need RunTestsInSeparateProcesses as well

[samsonasik]

Rename fixture usually solve it, but that will take try and errors, apply the RunTestsInSeparateProcesses into test classes is the fastest way to go, on this case, AutoImportNamesTest seems need to be updated as well

[samsonasik]

The removed fixtures should be rolled back to ensure no behaviour changed, I will check

[samsonasik]

I rolled back removed fixtures 3b43f59

[TomasVotruba]

@samsonasik Gotta go dinner now :). Feel free to merge when this is ready 🙏

We can test in the wild 💪

[samsonasik]

All checks have passed 🎉 @TomasVotruba let's merge it ;)