Push noir_js_backend_barretenberg into bb.js

[TomAFrench]

We currently have @noir-lang/backend_barretenberg which is a wrapper around bbjs in order to make it more user-friendly. We should push these UX improvements into @aztec/bb.js so we can be a pure consumer of barretenberg.

[TomAFrench]

One difficulty is that the logic in @noir-lang/backend_barretenberg depends on 'noir-lang/types which is a bit awkward as it results in a circular dependency between noir-lang/noir and aztecprotocol/aztec-packages so this will need to be resolved.

[Savio-Sou]

Might have to address #5106 before / alongside this Issue.

[TomAFrench]

how are these two issues related?

[Savio-Sou]

In case #5106 is a @noir-lang/backend_barretenberg bug instead of @aztec/bb.js, might be best to resolve that before this Issue (on the basis of cross-team expectations, rather than anything technical).

Simply flagging and will take your + Cody's lead.

[TomAFrench]

#5106 is due to barretenberg's memory usage and so it's entirely within bb.js