An alternative approach to#59627. The main issue is thatserializer.normalizer.property isn't tagged withserializer.normalizer, which, to my understanding, was intentional. SinceMimeMessageNormalizer depends on it, the same instance ofPropertyNormalizer (with the default named converter) is used for every named serializer.

This PR checks the arguments of normalizers and registers a child definition for any argument that is an instance ofNormalizerInterface and doesn't have theserializer.normalizer tag.

cc@ruudk