refactor(ops): Adding op2 macro and implementing in a couple of places (#19534)

This is a new op system that will eventually replace `#[op]`. 

Features
 - More maintainable, generally less-coupled code
 - More modern Rust proc-macro libraries
- Enforces correct `fast` labelling for fast ops, allowing for visual
scanning of fast ops
 - Explicit marking of `#[string]`, `#[serde]` and `#[smi]` parameters.

This first version of op2 supports integer and Option<integer>
parameters only, and allows us to start working on converting ops and
adding features.

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