The model name file should use pointer receiver

[tatsuhiro-t]

Currently, the generated model name file contains value receiver:

func (in Foo) OpenFooName() string {
        return "com.example.Foo"
}

Meanwhile, deepcopy-gen generates pointer receiver functions like:

func (in *Foo) DeepCopyInto(out *Foo) {
        ...
}

Go spec allows mixing value and pointe receiver functions, but it might introduce subtle bugs.
recvcheck linter will flag them.

Could you please generate a model name file with pointer receiver?
If the backward compatibility is required, it would be nice to gate this feature behind the flag.

Thank you.