Update rust to 2023-01-04

[samdealy]

Motivation

The repo is currently using of the nightly-2022-04-29 version of rust. This is problematic because it prevents us from using some of the latest features (e.g. #2965). This PR updates Rust and fixes a few clippy errors such as:

• Inline text formatting
• Result error variant too large: note, we disabled this lint because we don't want to introduce an alloc and the change is pretty substantial (you have to Box a lot of errors and are therefore unable to destructure inner error fields because Box is an opaque type, thus decreasing readability)
• Removal of unnecssary clone or references that clippy didn't catch previously.

If you see any instances of changes outside of those outlined above, feel free to leave a comment and I'll double check that it should be included.

Future Work

• Update repos that use mobilecoin.git as a submodule.

[cbeck88]

LGTM