Duplicate imports break annotation code generation

In [this example](https://github.com/fabiobrz/quarkus-cel-k8s-validator), the Go compiled module has 2 imports `fd_write`.
This is legal Wasm and the engine works great but the `WasmModuleInterface` breaks as it is emitting two colliding functions in the same class.

Since this is allowed, we need a way to gracefully handle this case.