Reduce a number of Rust function calls from JavaScript code

[matjazv]

Description

• when calling Rust bindings from JavaScript code we get some execution performance penalty due to an additional code which needs to be executed because of a bridge between two different programming languages
• A good example are functions StateReadWriter.set() and StateReadWriter.get() in state_db.js file. In these two functions there are multiple Rust binding calls. Because these two functions are heavily used, overall code execution performance is slow because of a lot of bridge calls between JavaScript and Rust code.
• develop an idea how such JavaScript functions could have less Rust function calls

Acceptance Criteria

• JavaScript code has less Rust function calls

Additional Information

• one idea is that JavaScript part of lisk-db will have it's own temporary database/cache to store and read data inside it and only call Rust code in case that expected data won't be present in its database/cache