feat: check_one_of also looks at field alias

[terrypireaux]

Is your feature request related to a problem? Please describe.

The current check_one_of (PydanticV2 for instance) does not work if utilizing a field aliases. This is problematic if adding a plugin_config utilizing a custom base_model_class for example:

class CustomBaseSchema(BaseModel):
    # override the ConfigDict to use PydanticV2 alias_generator 
    model_config = ConfigDict(
        alias_generator=to_camel,
        populate_by_name=True,
        from_attributes=True,
    )
base_model_class: Type[BaseModel] = CustomBaseSchema

Describe the solution you'd like For fields defined in in the one_of_dict, check if it has an alias.

// p2p: {"required": true, "oneof_extend": {"optional": ["some_nested_message"]}}

The above should also work with SomeNestedMessage.