Add-lines patcher can not be converted from .yaml to .php

[alexander-schranz]

Stumbled over that add-lines implemented in #975 is now used not only for phpunit.xml.dist files or .js, ... files but also for config recipes files.

Sadly used for config/packages/.. or config/routes/.. I personally would avoid using that and have another mechanism there.

Maybe merged .yaml or even own notifier_...yaml would be better there.

This kind of configurations can currently this way not be converted to PHP based recipes. And I don't see a way for do it, without somebody need todo this manually for every recipe.

This recipe patches will so fail on PHP based config recipes repo currently: https://github.com/schranz-php-recipes/symfony-recipes-php/pull/44/files#