Make methods accepting ids by value generic over its referencedness

[DCNick3]

In a lot of places we accept an id (like AccountId) by value, requiring spelling out .clone() in a lot of places where the id cannot actually be consumed.

A very similar problem is faced when passing strings in rust. Into<String> is a generally acceptable way to receive an owned string value, while allowing implicit clones of &String and &str.

I think we can get a similar benefits by implementing From<&Id> for Id for all out id types and using Into<Id> in function signatures. Then instead of whiff(floof.clone()) we would be able to write whiff(&floof).

I feel the client-facing APIs (like constructing instructions and queries) could benefit greatly from this: our integration tests have a lot of clutter in form of .clone()s. Some parts of iroha_core might benefit too.