Add instrumentations for various ACVM optimzations

[TomAFrench]

We're spending significant time in the transformer step: https://github.com/noir-lang/noir/blob/master/acvm-repo/acvm/src/compiler/transformers/mod.rs

Not much thought has been put into optimizing these so we should add some instrumentation so we can track which of these are the lowest hanging fruit.

[TomAFrench]

We might as well refactor these to make each optimization/transformation a single function (as opposed to having a separate setup step) so we can use the macros cleanly.