DRAFT: Ports command line argument handling for proxy and handler to Rust

[serra-fastly]

This change is a part of the transition from C++ to Rust.

Argument handling has been collapsed into core/argsdata.cpp and core/ccliargs.rs for C++ and Rust respectively. Old argument parsing logic was removed from the C++ modules. Runner was updated with the new command line values to standardize tags.

I chose not to use the CliArgs class that already existed for runner because the C++ modules will eventually be phased out and it'll be easier to clean up C++ related code if they're already extracted out into their own classes.

I've created unit testing for both the Rust modules that send the arguments within cliargs.rs and the C++ modules that receive the modules within [handler/proxy]argstest.cpp. The equality comparison operator was overloaded for the Setting class to aid in unit testing.

The boost include address for homebrew on MacOS Silicon OSs was also added.

It has not currently been tested on a test node yet, coming soon.

[deg4uss3r]

PR looks good! Minus one debugging statement left in I think this is ready to test on a node for correctness.