[DependencyInjection] Apply attribute configurator to child classes

[fabpot]

Q	A
Feature PR	symfony/symfony#54365
PR author(s)	@GromNaN
Merged in	7.1

We created this issue to not forget to document this new feature. We would really appreciate if you can help us with this task. If you are not sure how to do it, please ask us and we will help you.

To fix this issue, please create a PR against the 7.1 branch in the symfony-docs repository.

Thank you! 😃

[alexandre-daubois]

I think this is super internal and can be closed 🙂

[GromNaN]

What can be documented is the possibility of extending certain attributes to avoid duplicating certain options, as explained in the issue: symfony/symfony#52898