[Rust] custom derive for struct/enum with resource types

Currently custom derive applies to all struct and enum definitions. Understandably, the resource struct doesn't use the custom derive. The problem is that when the struct/enum type contains a resource type, the derive trait will not work. We can use `additional-derive-ignore` to opt-out such types individually, but that's not very convenient.

I can see several ways to fix it, but not sure which one makes more sense:
1) Only apply custom derive to struct and enum that doesn't contain resource types. This is equivalent to manually opt-out those types with `additional-derive-ignore`.
2) Apply the custom derive to resource struct as well. But many traits don't make sense for resource types.
3) Have a flag to define custom derive for individual types, similar to `with`, we can have a `with-derive`.

Maybe in the short term, we can apply the first option, which is also easy to implement?