Fix spring-data-jpa field lookup with layered @MappedSuperclasses

Fixes #12753

Note: Before the fix, but with the new `Animal` and `Mammal` mapped superclasses, the integration tests were failing with:
```
UnableToParseMethodException: Field id which was configured as the order field does not exist in the entity. Offending method is findByColorIsNotNullOrderByIdDesc
```
This is not exactly the same type of query/method name as #12753, but I think it is good enough.

/cc @geoand