[Feature Request][move] Provide an API which allows to resolve symbolic information into a function value

[wrwg]

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There are multiple use cases where a need arises to create a function value from symbolic information (like address and name of function, given as a string). So far we know:

• Ability to replace fungible asset dispatch with function values and henceforth minimize the logic in the VM.
• Ability to generalize governance logic

The suggested approach is to introduce a new module in the framework as follows:

module std::functions {
    /// Resolves a symbolically provided function name into a function value. `T` must be a function type.
    /// The function `addr::module::func` must exist and be assignable to type `T`, otherwise this function aborts.
    public native fun resolve<T>(addr: address, module: String, func: String): T;
}

Usage is for example as below:

let f = resolve<|u64|u64>(@0xff, utf8(b"some_module"), utf8(b"some_func"));
let r = f(22)

The implementation of this feature should be relative simple, because a resolution mechanism is already present for deserialization, however, extra scrutiny need to be put into correctness because of the potential of type confusion.