Include new contract data function tree root in tx hash

[spalladino]

• Refactors wasm wrappers in bb and circuits
• Introduces new primitives wasm wrapper (using bb wasm for now)
• Uses calculateContractLeaf for calculating contract tree commitments used for the tx hash
• Makes txHash tx getter async (sorry)

Note that, since we now depend on circuits for explicitly calculating contract leaves via the computeContractLeaf cbind, the primitives wasm is left unused. I'm leaving it as part of the PR since we can leverage it in the future for more lightweight dependencies, but I wouldn't worry about this atm.

Depends on AztecProtocol/aztec3-circuits#178

Fixes #154

[ludamad]

Not the biggest fan of the Wrapper name, the intent was that the generic concept was called WasmModule

[ludamad]

Almost any utility class could be called a Wrapper, is my reasoning, but it represents what it wraps

[spalladino]

Agree, and WasmModule was also my first choice for a name, but there's already a lower level WasmModule in the repo.

[ludamad]

Yeah I created that one, it was meant to provide everything needed to just pass around without introducing base classes

[ludamad]

I suppose that's not quite right though with async call state

[ludamad]

+1 if we're going to have a dependency system no reason to copy dependencies one by one (which mostly can help with docker figuring out its own dependencies)

[spalladino]

#224

[ludamad]

LGTM other than naming comment

[spalladino]

I cannot come up with a better name for now. I'll merge and keep thinking about it.