modelNamePrefix Doesn't Work With 'oneof' Inheritance in Java

When there is a oneOf relationship in the openapi specification, say:

Pet:
  oneOf:
    - $ref: '#/components/schemas/Cat
    - $ref: '#/components/schemas/Dog'

And a modelNamePrefix is specified (say Model), the Cat and Dog model classes will have the following class signatures

public class ModelCat  implements Pet
...
public class ModelDog  implements Pet

This causes a compilation error without any ancillary code because the Pet model class is generated as ModelPet.

I believe the fix is pretty simple and the source of the issue is the population of the interfaceModels list for the CodegenModel in the DefaultCodegenConfig.postProcessAllModels method

Start in DefaultCodegenConfig.postProcessAllModels and inspect how the interfaceModels list is populated for oneOf inheritance when modelNamePrefix is set. Trace the generated references for ModelPet, ModelCat, and ModelDog, then verify that the generated Java classes compile without the interface-name mismatch.