Can 'Host' expressions be refactored?

[dcodeIO]

While working on the C-API I wondered whether Host expressions can be replaced. These cover memory.grow and memory.size currently, but we also have distinct kinds for memory.init, data.drop, memory.copy and memory.fill not utilizing common base classes. Looks like refactoring Host into MemoryGrow and MemorySize would make the API more straight forward?

[kripken]

It would probably be good to refactor that way, yeah. It might make sense to wait for the automatic code generation stuff #2414, though, since that would make this easier / take less boilerplate

[tlively]

These expressions have since been refactored into their own expression classes.