[feature] Pass wasm payloads directly

[Arjentix]

Need to remove unpacking inside exntrypoints macro and pass payloads directly to user function. Also need to annotate all payloads as #[non_exhaustive].

[Arjentix]

@Erigara , you were the original author of this issue, do you still think it makes sence to keep it?

@0x009922 , I remember we discussed that issue some months ago and you've said that you don't understand why do we have it. If you want to recap I suggest looking at referenced PR #3813, things haven't changed much in that place

I'd vote for closing this. What do you guys think?

[Erigara]

Still not sure why do we need packing? for different entrypoints